2018/input/12.txt

initial state: #.##.#.##..#.#...##...#......##..#..###..##..#.#.....##..###...#.#..#...######...#####..##....#..###

##.## => .
##... => #
..#.# => #
#.... => .
#..#. => #
.#### => .
.#..# => .
.##.# => .
#.##. => #
####. => .
..##. => .
##..# => .
.#.## => #
.#... => .
.##.. => #
..#.. => #
#..## => #
#.#.. => #
..### => #
...#. => #
###.. => .
##.#. => #
#.#.# => #
##### => #
....# => .
#.### => .
.#.#. => #
.###. => #
...## => .
..... => .
###.# => #
#...# => .