diff --git a/19.hs b/19.hs
new file mode 100644
index 0000000..df0cf5c
--- /dev/null
+++ b/19.hs
@@ -0,0 +1,35 @@
+import Data.List (elemIndex)
+import Data.Matrix (Matrix, fromLists, (!))
+
+type Grid = Matrix Char
+data Direction = North | South | West | East | Stop deriving Eq
+data State = State (Int, Int) Direction [Char] Int
+
+nextState :: String -> Grid -> State -> State
+nextState letters grid (State (r, c) dir seen count) =
+    let (nextR, nextC) = case dir of
+            North -> (r - 1, c)
+            South -> (r + 1, c)
+            West  -> (r, c - 1)
+            East  -> (r, c + 1)
+        nextChar = grid ! (nextR, nextC)
+        nextDir  = case nextChar of
+            '+' ->  if dir `elem` [North, South]
+                    then if grid ! (nextR, nextC - 1) == '-' then West  else East
+                    else if grid ! (nextR - 1, nextC) == '|' then North else South
+            ' ' ->  Stop
+            _   ->  dir
+        nextSeen = if nextChar `elem` letters then nextChar : seen else seen
+    in  State (nextR, nextC) nextDir nextSeen (count + 1)
+
+traverseGrid :: String -> Grid -> State -> (String, Int)
+traverseGrid _ _ (State _ Stop seen count) = (reverse seen, count)
+traverseGrid letters grid state = traverseGrid letters grid $ nextState letters grid state
+
+main :: IO ()
+main = do
+    input <- readFile "19.txt"
+    let rows = lines input
+        Just start = (+1) <$> (elemIndex '|' $ head rows)
+        letters = filter (not . (`elem` " +|-\n")) input
+    print $ traverseGrid letters (fromLists rows) (State (1, start) South [] 0)
\ No newline at end of file
diff --git a/19.txt b/19.txt
new file mode 100644
index 0000000..18567e4
--- /dev/null
+++ b/19.txt
@@ -0,0 +1,201 @@
+                                                                                                   |                                                                                                     
+ +-------------------+               +-+ +-------+       +-------------------+                     |                                         +---+                                   +-----+       +---+ 
+ |                   |               | | |       |       |                   |                     |                                         |   |                                   |     |       |   | 
+ |         +---+     |   +---------------|-------|-----------------------+ +-----------------------------+                                   |   |                                   |     |       |   | 
+ |         |   |     |   |           | | |       |       |               | | |                     |     |                                   |   |                                   |     |       |   | 
+ |         |   +---------------------|-----------------------------------|-------------------------------------------------------------------|-----------------+           +-----------------------+   | 
+ |         |         |   |           | | |       |       |               | | |                     |     |                                   |   |             |           |         |     |           | 
+ |         |         |   +-------------|-|---------------|---------------|---|---------------------------|-------------------------+         |   |             |         +-|---------|-------------+   | 
+ |         |         |               | | |       |       |               | | |                     |     |                         |         |   |             |         | |         |     |       |   | 
+ |   +-------------------------------|-----------|-------|---------------|---|---------------------|-----|-----------------------------------|---|-------------+ +-------+ |         +-----|---+   |   | 
+ |   |     |         |               | | |       |       |               | | |                     |     |                         |         |   |               |         |               |   |   |   | 
+ |   +-+   |         |               | | |       |       |               +-+ |                     |     | +---------------------------------|---|---------------+         |               |   |   | +-+ 
+ |     |   |         |               | | |       |       |                   |                     |     | |                       |         |   |                         |               |   |   | |   
+ |     |   |         |               | | |   +---|-------|-------------------|---------------------|-----|-|---------------------------+     | +-|-------------+           | +-----+       |   |   | |   
+ |     |   |         |               | | |   |   |       |                   |                     |     | |                       |   |     | | |             |           | |     |       |   |   | |   
+ | +---|-------------------------------|-|---------------|---------------+   |                   +---------------------+           +-------+ +-|-|-------------------------|-|-----|---------------|---+ 
+ | |   |   |         |               | | |   |   |       |               |   |                   | |     | |           |               |   |   | |             |           | |     |       |   |   | | | 
+ | |   +---|-------------------------|---|---|-------------------------------|-+               +-----+ +-|-----------------------------|-------|---------------|-----------|-|-----+       |   |   | | | 
+ | |       |         |               | | |   |   |       |               |   | |               | | | | | | |           |               |   |   | |             |           | |             |   |   | | | 
+ | | +---+ | +-+     |               | | |   |   |       |       +-----------|-+               | +-|-----|---------------+             |   |   | |             |           | |             |   |   | | | 
+ | | |   | | | |     |               | | |   |   |       |       |       |   |                 |   | | | | |           | |             |   |   | |             |           | |             |   |   | | | 
+ | | |   | | | |     |     +---+     | | |   |   |       |       |       |   |       +---------|---|---|-|---------------|-----------------|---|-|-------------|-------------|---------+ +-|-+ |   | | | 
+ | | |   | | | |     |     |   |     | | |   |   |       |       |       |   |       |         |   | | | | |           | |             |   |   | |             |           | |         | | | | |   | | | 
+ | | +-+ | | | |     |     |   | +-+ | | |   |   |       |       |       |   |       |         |   | | | | |           | |             |   |   | |             |           | +-----------+ | | |   | | | 
+ | |   | | | | |     |     |   | | | | | |   |   |       |       |       |   |       |         |   | | | | |           | |             |   |   | |             |           |           |   | | |   | | | 
+ | |   +-----|-|-+   |     |   | +-|-|-|-------+ |       |       | +---+ |   |       |         |   | | +-----------------------+       |   |   | |             |           |           |   | | |   | | | 
+ | |     | | | | |   |     |   |   | | | |   | | |       |       | |   | |   |       |         |   | |   | |           | |     |       |   |   | |             |           |           |   | | |   | | | 
+ | |     | | | +-|---------|---|---|-|-|-|---|---|---+   |       | |   | |   |       |         |   | |   | |           | |     |       |   |   | |             |           |           |   | | |   | | | 
+ | |     | | |   |   |     |   |   | | | |   | | |   |   |       | |   | |   |       |         |   | |   | |           | |     |       |   |   | |             |           |           |   | | |   | | | 
+ | |     | | |   |   |     |   | +-+ | | +-----|-|-------|-------------|-----|-----------------|---|-|-----|-----------|-|-----|-------|-----------------------------------|---------------|---------+ | 
+ | |     | | |   |   |     |   | |   | |     | | |   |   |       | |   | |   |       |         |   | |   | |           | |     |       |   |   | |             |           |           |   | | |   |   | 
+ | | +-----|-|---|-------------|-|-------------------|-------------|---|-|-----------|---------|---------|-----------------------------+   | +-|---------------|-+     +---------------|---|-|-------+ | 
+ | | |   | | |   |   |     |   | |   | |     | | |   |   |       | |   | |   |       |         |   | |   | |           | |     |           | | | |             | |     |   |           |   | | |   | | | 
+ | +-|-----|-|-------|-----|-----|-+ | | +-----|-|-------|---------------------------+         |   | |   | |           | |     |           | | | |             | |     |   |           +-----|-+   | | | 
+ |   |   | | |   |   |     |   | | | | | |   | | |   |   |       | |   | |   |                 |   | |   | |           | |     |           | | | |             | |     |   |               | |     | | | 
+ |   |   | | |   |   |     |   | | | | | |   | | |   |   |       | |   | |   |         +------I|---|-------|-----------|-|---------------------|---------------|-------|---|-+         +-------+   | | | 
+ |   |   | | |   |   |     |   | | | | | |   | | |   |   |       | |   | |   |         |       |   | |   | |           | |     |           | | | |             | |     |   | |         |   | | |   | | | 
+ |   |   | | |   |   |     |   +-|---|-|-|-----+ |   |   |       | |   | |   |         |       |   | |   | |       +---|-------|----Z------------|-------------|-----------|-----------|-+ | | |   | | | 
+ |   |   | | |   |   |     |     | | | | |   |   |   |   |       | |   | |   |         |       |   | |   | |       |   | |     |           | | | |             | |     |   | |         | | | | |   | | | 
+ |   |   +-|---------------|-----|---|-|-----|---+   |   |       | |   | |   |         |       |   | |   | |       |   | |     |     +-----------|-------------|-------------|-+       | | | | |   | | | 
+ |   |     | |   |   |     |     | | | | |   |       |   |       | |   | |   |         |       |   | |   | |       |   | |     |     |     | | | |             | |     |   | | |       | | | | |   | | | 
+ |   |     | |   |   |     |     +---|-|-----------+ | +-|-------+ |   | +-------------|-------|---|-----|---------|---|-|-------------------|-|---------------|-------|-----+ |       | | | | |   | | | 
+ |   |     | |   |   |     |       | | | |   |     | | | |         |   |     |         |       |   | |   | |       |   | |     |     |     | | | |             | |     |   |   |       | | | | |   | | | 
+ |   |     | |   |   |     |       | | | |   |     | | | |       +-|---|---------------|-------|---|-------|-------|---|-----------+ +---------------------------+     |   |   |     +-|---|-|-|-+ | | | 
+ |   |     | |   |   |     |       | | | |   |     | | | |       | |   |     |         |       |   | |   | |       |   | |     |   |       | | | |             |       |   |   |     | | | | | | | | | | 
+ |   |     | |   |   |     |       | | | |   |     | | | |       | |   |     |         |       |   | |   | |       |   | |     |   |       | | | |             |       |   |   |     | | | | | | | | | | 
+ |   |     | |   |   |     |       | | | |   |     | | | |       | |   |     |         |       |   | |   | |       |   | |     |   |       | | | |             |       |   |   |     | | | | | | | | | | 
+ |   |     | |   |   |     | +-----|---|-|---------|-|-|---------|-----------|---------|-------------|-------------------+     |   |       | | | |             |       |   |   |     | | | | | | | | | | 
+ |   |     | |   |   |     | |     | | | |   |     | | | |       | |   |     |         |       |   | |   | |       |   |       |   |       | | | |             |       |   |   |     | | | | | | | | | | 
+ |   |     | |   |   |     | |     | | | |   |     | | | |       | |   |     |         |       |   | |   | |       |   |       | +-|-----+ | | | |             | +-------------|-------|-|-|-+ | | | | | 
+ |   |     | |   |   |     | |     | | | |   |     | | | |       | |   |     |         |       |   | |   | |       |   |       | | |     | | | | |             | |     |   |   |     | | | |   | | | | | 
+ +---------|-----|---------|-|-----|-|-|-------------------------|-|---------|---------|-----------|-|---|---------|---|-------|-------------|-|-|---------+   | |     |   |   |     | | | |   | | | | | 
+     |     | |   |   |     | |     | | | |   |     | | | |       | |   |     |         |       |   | |   | |       |   |       | | |     | | | | |         |   | |     |   |   |     | | | |   | | | | | 
+     |     | |   |   |     | |     | | | |   |     | | | |       | |   |     |         |       |   | |   | |       |   |       | | |     | | | | |         |   | |     |   |   +-+   | | | |   | | | | | 
+     |     | |   |   |     | |     | | | |   |     | | | |       | |   |     |         |       |   | |   | |       |   |       | | |     | | | | |         |   | |     |   |     |   | | | |   | | | | | 
+     |     | |   |   |     | |     | +-|-|---|-------|-----------------------|---------------------|-+   | |       |   |       | | |     | | | | |         |   | |     |   |     |   | | | |   | | | | | 
+     |     | |   |   |     | |     |   | |   |     | | | |       | |   |     |         |       |   |     | |       |   |       | M |     | | | | |         |   | |     |   |     |   | | | |   | | | | | 
+ +---|-------|---|-----------------|---|-|---|-----------|-------------------|---------------------|-----|---------|---|-------|-|-|-----------+ |         |   | |     |   |     |   | | | |   | | | | | 
+ |   |     | |   |   |     | |     |   | |   |     | | | |       | |   |     |         |       |   |     | |       |   |       | | |     | | |   |         |   | |     |   |     |   | | | |   | | | | | 
+ |   |     | |   |   |     | |     |   | |   |     | | | |       | |   |     |         |       |   |     | |       |   |       | | |     | | |   |         |   | |     |   |     |   | | | |   | | | | | 
+ |   |     | |   |   |     | |     |   | |   |     | | | |       | |   |     |         |       |   |     | |       |   |       | | |     | | |   |         |   | |     |   |     |   | | | |   | | | | | 
+ |   |     | |   |   |     | |     |   | |   |     | | | |       | |   |     |         |       |   |     | |       |   |       +-|-----+ | | |   |         |   | |     |   |     +---+ | | |   | | | | | 
+ |   |     | |   |   |     | |     |   | |   |     | | | |       | |   |     |         |       |   |     | |       |   |         | |   | | | |   |         |   | |     |   |           | | |   | | | | | 
+ |   |     | |   |   |     | |     |   | |   |     | | | |       | |   |     |         |       |   |     | |       |   |         | |   | | | |   |         |   | |     |   |           | | |   | | | | | 
+ |   |     | |   |   |     | |     |   | |   |     | | | |       | |   |     |         |       |   |     | |       |   |         | |   | | | |   |         |   | |     |   |           | | |   | | | | | 
+ |   |     | |   |   |     | |     |   | |   |     | | | +-------|---------------------|-+     |   |     | |       |   |         | |   | | | |   |         |   | +-+ +-------------------|-+   | | | | | 
+ |   |     | |   |   |     | |     |   | |   |     | | |         | |   |     |         | |     |   |     | |       |   |         | |   | | | |   |         |   |   | | |   |           | |     | | | | | 
+ |   +-+   | |   |   |     | | +-----+ | |   |     | | |       +-|-----------|---------------------|-----------------------------|-------|-|-----|-------------|-------|-----------------------|-+ | | | 
+ |     |   | |   |   |     | | |   | | | |   |     | | |       | | |   |     |         | |     |   |     | |       |   |         | |   | | | |   |         |   |   | | |   |           | |     |   | | | 
+ |   +-|-----|-------|-----|---|-----|-|-----|---------|-----+ | | |   |     |   +-----|-|-----|---|-+   | |       |   |         | |   | | | |   |         |   |   | | |   |           | |     |   | | | 
+ |   | |   | |   |   |     | | |   | | | |   |     | | |     | | | |   |     |   |     | |     |   | |   | |       |   |         | |   | | | |   |         |   |   | | |   |           | |     |   | | | 
+ |   | +---+ |   |   | +---+ | |   | | | |   | +---|---------|-|---|---------|---+     | |     |   | |   | |       |   |         | |   | | | |   |         |   |   | | |   |           | |     |   | | | 
+ |   |       |   |   | |     | |   | | | |   | |   | | |     | | | |   |     |         | |     |   | |   | |       |   |         | |   | | | |   |         |   |   | | |   |           | |     |   | | | 
+ |   |       |   |   | |     | | +---|---|-----|-----|-+     | | | |   |     |         | |     |   | |   | |       |   |         | |   | | +-|---|---------|-----------------------------------|---+ | | 
+ |   |       |   |   | |     | | | | | | |   | |   | |       | | | |   |     |         | |     |   | |   | |       |   |         | |   | |   |   |         |   |   | | |   |           | |     |     | | 
+ | +-----------------|-------|-----|---------------|-|-------|---|-----------+   +-----|-+     |   | |   | |       |   |         | |   | |   |   |         |   |   | | |   |           | |     |     | | 
+ | | |       |   |   | |     | | | | | | |   | |   | |       | | | |   |         |     |       |   | |   | |       |   |         | |   | |   |   |         |   |   | | |   |           | |     |     | | 
+ | | |   +---|---+   | |     | | | | | | |   | |   | |       | | | |   |         |     |       |   | |   | |       |   |         | |   | |   |   |         |   |   | | |   |           | |     |     | | 
+ | | |   |   |       | |     | | | | | | |   | |   | |       | | | |   |         |     |       |   | |   | |       |   |         | |   | |   |   |         |   |   | | |   |           | |     |     | | 
+ | | |   | +-|-----------------|-|---|---+   | |   | |       | | | |   |         |     |       |   +-------|-------|-------------|-|-----|-------|---------|---------|-----|-----------|-----------+ | | 
+ | | |   | | |       | |     | | | | | |     | |   | |       | | | |   |         |     |       |     |   | |       |   |         | |   | |   |   |         |   |   | | |   |           | |     |   | | | 
+ | | | +-|-|-|-------|-|-----|-|-|---|-|-----------+ |       | | | |   |       +-------|-------|---------|---------|-----+       | | +-|-+   |   | +---+   |   |   | | |   |           | |     |   | | | 
+ | | | | | | |       | |     | | | | | |     | |     |       | | | |   |       | |     |       |     |   | |       |   | |       | | | |     |   | |   |   |   |   | | |   |           | |     |   | | | 
+ | | | | | | |     +-|-|-----|-----|-|-------|-------|-------------------------+ |     |       |     |   | |       |   | +---------|-----------+ | |   |   |   |   | | |   |           | |     |   | | | 
+ | | | | | | |     | | |     | | | | | |     | |     |       | | | |   |         |     |       |     |   | |       |   |         | | | |     | | | |   |   |   |   | | |   |           | |     |   | | | 
+ | | | +---|-------+ | | +-+ | | | | | |     | |     |       | | +-|-------------|-------------|---------|---------+   | +-------|---|-------|---|---------|-----------------------------|-----+   | | | 
+ | | |   | | |       | | | | | | | | | |     | |     |       | |   |   |         |     |       |     |   | |           | |       | | | |     | | | |   |   |   |   | | |   |           | |         | | | 
+ | | |   | | |       | | +-|-|-+ +-|---|-------|-----|---+   | |   | +-----------|-----|-------------|---|-|-----------------------|-|---------------------|---|-------|---------------|-|-------+ | | | 
+ | | |   | | |       | |   | |     | | |     | |     |   |   | |   | | |         |     |       |     |   | |           | |       | | | |     | | | |   |   |   |   | | |   |           | |       | | | | 
+ | | |   | | |       | | +---|-+   | | |     | |     | +-----|-|---|-|-----------|-------+     |     |   | |           | |       | | | |     | | | |   |   |   |   | | |   |           | |       | | | | 
+ | | |   | | |       | | | | | |   | | |     | |     | | |   | |   | | |         |     | |     |     |   | |           | |       | | | |     | | | |   |   |   |   | | |   |           | |       | | | | 
+ | | |   | | |       | | | | | | +-+ | |     | |     | +-----|-----|-+ |         |     | |     |     |   | |           | |     +---|-|-|-----+ | | |   +---|-------|-------|-----------|---+     | | | | 
+ | | |   | | |       | | | | | | |   | |     | |     |   |   | |   |   |         |     | |     |     |   | |           | |     | | | | |       | | |       |   |   | | |   |           | | |     | | | | 
+ | | |   | | |       | | | | | | |   | |     | |     |   |   | |   |   |         |     | |     |     |   | |           | |     | | | | |       | | |       |   |   | | |   |           | | |     | | +-+ 
+ | | |   | | |       | | | | | | |   | |     | |     |   |   | |   |   |         |     | |     |     |   | |           | |     | | | | |       | | |       |   |   | | |   |           | | |     | |     
+ | | |   | | |       | +---|-|-|-------|-------|-------------|-|-----------------|-------------------+   | |           | |     | | | | |     +-|-|-|-------|-------------------------------------|-----+ 
+ | | |   | | |       |   | | | | |   | |     | |     |   |   | |   |   |         |     | |     |         | |           | |     | | | | |     | | | |       |   |   | | |   |           | | |     | |   | 
+ | | |   | | |     +-|-------------+ O | +---|-|---------|-+ | |   |   |         |     | |     |         | |           | |     | | | | |     | | | |     +-+   | +-|-|-----------+     | | |     | | +-+ 
+ | | |   | | |     | |   | | | | | |   | |   | |     |   | | | |   |   |         |     | |     |         | |           | |     | | | | |     | | | |     |     | | | | |   |     |     | | |     | | |   
+ | | |   | +-|-------|---|-------|-|---|-------------|---|-|-------|-------------------|-|-----|---------+ |           | |     | | | | |     | | | |     |     | | | | |   |     |     | | |     | | |   
+ | | |   |   |     | |   | | | | | |   | |   | |     |   | | | |   |   |         |     | |     |           |           | |     | | | | |     | | | |     |     | | | | |   |     |     | | |     | | |   
+ | | |   | +-|-----|-----|-|---|---|---|-----+ |     |   | +-------|-+ |         |     | |     |           |   +---------|-------|-|---|-----|-|-+ |     |     | | | | |   |     |     | | |     | | |   
+ | | |   | | |     | |   | | | | | |   | |     |     |   |   | |   | | |         |     | |     |           |   |       | |     | | | | |     | |   |     |     | | | | |   |     |     | | |     | | |   
+ | | |   | | |     | |   | | | | | | +---+     |     |   |   +-|-----|-|---------|-------------------------------------|---------|---|-------|-----|---+ |     | | | | |   |     |     | | |     | | |   
+ | | |   | | |     | |   | | | | | | | |       |     |   |     |   | | |         |     | |     |           |   |       | |     | | | | |     | |   |   | |     | | | | |   |     |     | | |     | | |   
+ | | |   | | |     | | +-|-|---|---|-|-|-------------|---------------|-----------------|-|-----|-----------|---|-------|-------+ | | | |     | |   |   | |     | | | | |   |     |     | | |     | | |   
+ | | |   | | |     | | | | | | | | | | |       |     |   |     |   | | |         |     | |     |           |   |       | |       | | | |     | |   |   | |     | | | | |   |     |     | | |     | | |   
+ | | | +-------------|-|-----|---|-|---|-------------|---|---+ |   | | |         |     | |     |           |   +-------|-----------|-|-------|-|---|-----|-----|-+ | | |   |     |     | | |     | | |   
+ | | | | | | |     | | | | | | | | | | |       |     |   |   | |   | | |         |     | |     |           |           | |       | | | |     | |   |   | |     |   | | |   |     |     | | |     | | |   
+ +-|-+ | | | |     | | | | | | | | | | |       |     |   +---|-|---|-|-|---------|-----|-------|-------------------------------------|---------|---------------|-----|-|---------------|---------+ | |   
+   |   | | | |     | | | | | | | | | | |       |     |       | |   | | |         |     | |     |           |           | |       | | | |     | |   |   | |     |   | | |   |     |     | | |       | |   
+   |   | | | |     | | | | | | | | | | |       |   +-|-------------|-|-----------|-------------|---------------------------------|---|-|-----------------------|-----|-----------------|---+       | |   
+   |   | | | |     | | | | | | | | | | |       |   | |       | |   | | |         |     | |     |           |           | |       | | | |     | |   |   | |     |   | | |   |     |     | |         | |   
+   |   | | | |     | | | | | | | | +-|-|-------|---|-|-------------|-------------|-------------------------------------+ |     +-|---|-------|-----|-----------|---+ | |   |     |     | |         | |   
+   |   | | | |     | | | | | | | |   | |       |   | |       | |   | | |         |     | |     |           |             |     | | | | |     | |   |   | |     |     | |   |     |     | |         | |   
+   |   | | | |     | | | | | | | |   | | +-------+ | | +-----|-----+ | |         |     | |     |           |             |     | | | | |     | +--N|-----|-----|-----|---+ |     +-------|-+       | |   
+   |   | | | |     | | | | | | | |   | | |     | | | | |     | |     | |         |     | |     |           |             |     | | | | |     |     |   | |     |     | | | |           | | |       | |   
+   | +-+ | | |     | | +---------|-----|-|-------+ | | |     +-|---+ | |         |     +-|-----|-----------|---------------------|---|-------|-----|-----------|-----|-+ | |           | | |       | |   
+   | |   | | |     | |   | | | | |   | | |     |   | | |       |   | | |         |       |     |           |             |     | | | | |     |     |   | |     |     |   | |           | | |       | |   
+   | | +---|-------|-|---|-|---------|-|-------+   | | |     +-------|-|-----------------|-----|-----------|-------------|-------------|-------+   |   | |     |     |   | |           | | |       | |   
+   | | | | | |     | |   | | | | |   | | |         | | |     | |   | | |         |       |     |           |             |     | | | | |     | |   |   | |     |     |   | |           | | |       | |   
+   | | | | | |     | |   | +-|-------+ | |         | | |     | |   | | |         |       |     |           |             |     | | | | |     | |   |   | |     |     |   | |           | | |       | |   
+   | | | | | |     | |   |   | | |     | |         | | |     | |   | | |         |       |     |           |             |     | | | | |     | |   |   | |     |     |   | |           | | |       | |   
+   | | | | | |     | |   |   | | |     | |         | | |     | |   | | |         |       |     |           |             |     | | | | +-------|---|---|-|-----------|-----|-----------|---|---+   | |   
+   | | | | | |     | |   |   | | |     | |         | | |     | |   | | |         |       |     |           |             |     | | | |       | |   |   | |     |     |   | |           | | |   |   | |   
+   | | | | | |     | +-------|-|-------|-|-------------------|-|-------|-------------------------------------------------|-----|-|-----------|-|---|-----|-----------|---|-|-----------+ | |   |   | |   
+   | | | | | |     |     |   | | |     | |         | | |     | |   | | |         |       |     |           |             |     | | | |       | |   |   | |     |     |   | |             | |   |   | |   
+   | | | | | |     | +---|-------|-------------------|-|-------|---|-|-----------------+ |     |           |             | +---+ | | |       | |   |   | |     |     |   | |             | |   |   | |   
+   | | | | | |     | |   |   | | |     | |         | | |     | |   | | |         |     | |     |           |             | |     | | |       | |   |   | |     |     |   | |             | |   |   | |   
+   | | | | | |     | |   |   | | |     | |         | | |     | |   | | |         |     | |     |           |             | |     | | |       | |   |   | |     |     |   | |             | |   |   | |   
+   | | | | | |     | |   |   | | |     | |         | | |     | |   | | |         |     | |     |           |             | |     | | |       | |   |   | |     |     |   | |             | |   |   | |   
+   | | | | | |     | |   |   | | |   +---|-----+   | | |     | |   | | |         |     | |     |           |             | |     | | +-------|-|---|-----|-----------|-------------------|-----+   | |   
+   | | | | | |     | |   |   | | |   | | |     |   | | |     | |   | | |         |     | |     |           |             | |     | |         | |   |   | |     |     |   | |             | |       | |   
+   | | | +-|-----------------|-+ |   | | |     |   | | |     | |   | | |         |     | |     |           |             | |     | |         | |   |   | +-----|-----|-+ | |   +-+       | |       | |   
+   | | |   | |     | |   |   |   |   | | |     |   | | |     | |   | | |         |     | |     |           |             | |     | |         | |   |   |       |     | | | |   | |       | |       | |   
+   +-------|-|-----|-|---|---|---------|-|-----|---|---|-----|-|---|---|---------------|-------|-----------|-------------|-------------------|-----------------------|-|-|-----|---------|-|---------|-+ 
+     | |   | |     | |   |   |   |   | | |     |   | | |     | |   | | |         |     | |     |           |             | |     | |         | |   |   |       |     | | | |   | |       | |       | | | 
+     | |   | |     | |   |   |   |   | | |     |   | | |   +-|-|-----|-|---------|-------|-------------------------------|-|-----|-----------------|---------------------|-----|-+       | |       | | | 
+     | |   | |     | |   |   |   |   | | |     |   | | |   | | |   | | |         |     | |     |           |             | |     | |         | |   |   |       |     | | | |   |         | |       | | | 
+     | |   +---------------------|---|-------------|---|---|-|-|-+ +-+ |         |     | |     |           | +-------------------------------|---------|---+   |     | | | |   |         | |       | | | 
+     | |     |     | |   |   |   |   | | |     |   | | |   | | | |     |         |     | |     |           | |           | |     | |         | |   |   |   |   |     | | | |   |         | |       | | | 
+     | |     |     | |   |   |   +---|---------|-----|-|---|-+ | |     +---------|-----|---------+         | |           | |   +-|-------+   | |   |   |   |   |     | | | |   |         | |       | | | 
+     | |     J     | |   |   |       | | |     |   | | |   |   | |               |     | |     | |         | |           | |   | | |     |   | |   |   |   |   |     | | | |   |         | |       | | | 
+     +---+   |     | |   |   |       | | |     |   | | |   |   | |               |     | |     | |         +-------------------|---------|-------------|---|---------|-|-------------+   | |       | | | 
+       | |   |     | |   |   |       | | |     |   | | |   |   | |               |     | |     | |           |           | |   | | |     |   | |   |   |   |   |     | | | |   |     |   | |       | | | 
+       | |   |     | |   |   |       | | |     | +-|-|--C--------+               |     | |     | |           |           | |   | | |     |   | |   |   |   |   |     | | | |   |     |   | |       | | | 
+       | |   |     | |   |   |       | | |     | | | | |   |   |                 |     | |     | |           |           | |   | | |     |   | |   |   |   |   |     | | | |   |     |   | |       | | | 
+     +-------------------|---------------|---------|-|-|---------------------------------|-----|-|-------------------------------|-|-----|-------------|-------------|---|-----|-----|---|-----------+ | 
+     | | |   |     | |   |   |       | | |     | | | | |   |   |                 |     | |     | |           |           | |   | | |     |   | |   |   |   |   |     | | | |   |     |   | |       |   | 
+     | | | +-------------|-----------------------|-|-|-|-------|---------+       |     | +-----|-------------|-------------|---|-------------|-|-+ |   |   |   |     | | | |   |     |   | |       |   | 
+     | | | | |     | |   |   |       | | |     | | | | |   |   |         |       |     |       | |           |           | |   | | |     |   | | | |   |   |   |     | | | |   |     |   | |       |   | 
+     | | | | |     | |   |   |       | | |     | | +-------|---|---------|---+   |     |       | |           +-------------------|-|-----------|-----------|---------+ | | |   |     |   | |       |   | 
+     | | | | |     | |   |   |       | | |     | |   | |   |   |         |   |   |     |       | |                       | |   | | |     |   | | | |   |   |   |       | | |   |     |   | |       |   | 
+     | | | | |     | | +---+ |       | | |     | |   | |   |   +---+     |   +---|-----------------------------------------|-+ | | |     |   | | | |   |   |   |       | | |   | +-------|-----------+ | 
+     | | | | |     | | | | | |       | | |     | |   | |   |       |     |       |     |       | |                       | | | | | |     |   | | | |   |   |   |       | | |   | |   |   | |       | | | 
+     | | | | |     | | | | | +-+     | | |     | |   +-|---|-------|-----|-------|---------------|-----------------------|---|-+ | |     |   | | | |   |   |   |       | | |   | |   |   | |       | | | 
+     | | | | |     | | | | |   |     | | |     | |     |   |       |     |       |     |       | |                       | | |   | |     |   | | | |   |   |   |       | | |   | |   |   | |       | | | 
+     | | | | |     | | | | | +-|-----------------------------------------+       |     |       | |                       | +-|-+ | |     |   +-----+   | +-----|-----------|---------|-----+       | | | 
+     | | | | |     | | | | | | |     | | |     | |     |   |       |             |     |       | |                       |   | | | |     |     | |     | | |   |       | | |   | |   |   |         | | | 
+     | | | | |     | | | | | | |     | | |     | |     |   |   +-------------------------------|---------------+         |   +-|-----------------|-----|-----------------|-|-----|-------------------+ | 
+     | | | | |     | | | | | | |     | | |     | |     |   |   |   |             |     |       | |             |         |     | | |     |     | |     | | |   |       | | |   | |   |   |         |   | 
+   +-+ | | | +-----|-----------+     | | |     +-|-----|---|---|-----------------|-------------|-|-----------------------+ +---|---+     |     | |     | | |   |       | | |   | |   |   |         |   | 
+   |   | | |       | | | | | |       | | |       |     |   |   |   |             |     |       | |             |           |   | |       |     | |     | | |   |       | | |   | |   |   |         |   | 
+   |   | | |       | | | | | |       | | |       |     |   +-+ |   |           +-|-----------------------------|-----------------|-------------|-------|---------------|---|---+ |   |   |         |   | 
+   |   | | |       | | | | | |       | | |       |     |     | |   |           | |     |       | |             |           |   | |       |     | |     | | |   |       | | |     |   |   |         |   | 
+ +-|---------------|-|---|-|---------|---+       |   +-------|-------------------|-------+     | | +---+       |           |   | |       |     | |     | +-------------+ | |     |   |   |         |   | 
+ | |   | | |       | | | | | |       | |         |   | |     | |   |           | |     | |     | | |   |       |           |   | |       |     | |     |   |   |         | |     |   |   |         |   | 
+ +-----|---|-+     | | | | | |       | |         |   | |     | |   +-------------|-------------|---|---|-------|---------+ |   | |       |     | |     |   |   |         | |     |   |   |         |   | 
+   |   | | | |     | | | | | |       | |         |   | |     | |               | |     | |     | | |   |       |         | |   | |       |     | |     |   |   |         | |     |   |   |         |   | 
+   |   | | | |     | | | | | |       | |         |   | |     | |             +---|-------|-------|-|---|-------|-----------|---|---------------------------|---|-----------|---------|---|-----------+ | 
+   |   | | | |     | | | | | |       | |         |   | |     | |             | | |     | |     | | |   |       |         | |   | |       |     | |     |   |   |         | |     |   |   |         | | | 
+   |   | | | +-------+ | | | +-------|-|-------------|-|-----+ |             | | |     | +-----|-|-|-----------------------|---|---------|---+ | |     |   |   |         | |     |   |   |         | | | 
+   |   | | |       |   | | |         | |         |   | |       |             | | |     |       | | |   |       |         | |   | |       |   | | |     |   |   |         | |     |   |   |         | | | 
+   |   | +---------|-+ | | |       +-+ |         |   | +-------|-------------|-|-------|---------------------------------|-----|-|-+     |   | | |     |   |   |         | |     |   |   |         | | | 
+   |   |   |       | | | | |       |   |         |   |         |             | | |     |       | | |   |       |         | |   | | |     |   | | |     |   |   |         | |     |   |   |         | | | 
+ +-+ +-+ +-----------|-+ | |       |   |         |   |         |             | | +-------------|-+ |   |       |         | |   | | |     |   | | |     |   |   |     +---|-|-----|-------+         | | | 
+ |   |   | |       | |   | |       |   |         |   |         |             | |       |       |   |   |       |         | |   | | |     |   | | |     |   |   S     |   | |     |   |             | | | 
+ | +-+   | |       | |   | |       |   |         |   |         | +-----------------------------|---|-----------+         | +-------|-----|-----|-+     |   |   |     |   | |     |   |             | | | 
+ | |     | |       | |   | |       |   |         |   |         | |           | |       |       |   |   |                 |     | | |     |   | |       |   |   |     |   | |     |   |             | | | 
+ +-+     | |       | |   | |       |   |         |   |         | |           | |       +-------|-------|-----------------|-----+ | +-----|-----|-------+   |   |     |   | |     |   |     +-------|-+ | 
+         | |       | |   | |       |   |         |   |         | |           | |               |   |   |                 |       |       |   | |           |   |     |   | |     |   |     |       |   | 
+         | |       | |   | |       |   |         |   |         | |           +-----------------+   |   +-----------------|---------------------|-----------|---------|-----|-----+   |     |       |   | 
+         | |       | |   | |       |   |         |   |         | |             |                   |                     |       |       |   | |           |   |     |   | |         |     |       |   | 
+         | |       | +-------------|---|--U--------------------|-+             |     +-------------|-------------------------------------------------------|---+     |   | |         |     |       |   | 
+         | |       |     | |       |   |         |   |         |               |     |             |                     |       |       |   | |           |         |   | |         |     |       |   | 
+         | |       |     | |       |   |         |   |         |               |     +-------------|-----------------------------|-----------------------------------------|---------+     |     +-|-+ | 
+         | |       |     | |       |   |         |   |         |               |                   |                     |       |       |   | |           |         |   | |               |     | | | | 
+     +---+ +-------|-------|-------|-----------------|---------------------------------------------|-------------------------------------------|---------------------|---|-|---------------|-----+ | | | 
+     |             |     | |       |   |         |   |         |               |                   |                     |       |       |   | |           |         |   | |               |       | | | 
+     |             +-----|-+       |   +---------+   |         |               |                   |         +-----------+       |       |   | |           +---------+   | |               |       | | | 
+     |                   |         |                 |         |               |                   |         |                   |       |   | |                         | |               |       | | | 
+     |                   |         |                 +-------------------------|-------------------|---------|---------------------------|---------------------------------+               |   +-----+ | 
+     |                   |         |                           |               |                   |         |                   |       |   | |                         |                 |   |   |   | 
+     |                   |         |                           +---------------------------------------------+                   |       |   +---------------------------+                 +---+   |   | 
+     |                   |         |                                           |                   |                             |       |     |                                                   |   | 
+     +-------------------+         +----------------------------------------T------------------------------------------------------------------|-------------------------------------------------+ |   | 
+                                                                               |                   |                             |       |     |                                                 | |   | 
+                                                                               +-------------------|-------------------------------+     |     |                                                 +-|---+ 
+                                                                                                   |                             | |     |     |                                                   |     
+                                                                                                   +-----------------------------+ +-----+     +---------------------------------------------------+     
+                                                                                                                                                                                                         
diff --git a/README.md b/README.md
index 6ae4615..60b59c0 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ These are the runtimes of only one trial but the variances are fairly small and
 | 16  |  0.462      |
 | 17  |  6.753      |  1.865
 | 18  |  0.118      |
+| 19  |  0.026      |
 
 Problems that should be optimized further: 15