diff --git a/input/06.txt b/input/06.txt
new file mode 100644
index 0000000..d02d3ff
--- /dev/null
+++ b/input/06.txt
@@ -0,0 +1 @@
+rvnvzvhzzjgjgffclllnhhtltptgptgpttjhttsllmbbphbpbzpbpjjcwjwqwccnrrtvrtrfrwffnqffsggwzzhtzhthqhffmrrzsrrnrtrqqbllhrlrjrvvrvvgdgjgfjjtzznffrfvfggswgssccpcwpccstcsstwssgzssswsgwsgsnsshcsscsffcwcmmhmsmrsrddwhhszsfsjfsfccwssvdssmzzwrzzjfzzvzzfsfsvshschhvlhhvmvpvhhstsdtstgtrrtjjcssgfssnsnfsnscnsslvvqbbhthqtqzqmzmjjfmmbdmmzdmdpmpnnfjnnrwnwbwrrwjrrttfzzlwwfmmnhhqlhqqbnqnqznncmmhfmfftsfszssftstggppfddtztltctqcqjcqcmclcnccdgcggvmvvcsstztbzttsccmgcghcczfzszbzmbmjjggsqgghbhjjhhrrjljmllczlzzqssjfjqfjfmfdfgffczfzwwpfwpwbbftbffplphhfcftctlcclhlnlhnhlhnhqnhhjbjmmtpmmlsmllvhhjghhmzzwpzprrjrzzvrvcvqvssgssnccmgmppfhfwhhczhhprhrffpvvqrqvqccdhdvvvssvdvwdwwzggfvfnvvqvwwzwmzzvttgzzwjjfvvpvffqpqhqrrwccjbjppbzbrbrrphrhgrhhzbbhrrblbjjznnlccsffpcfpcfpfddfwddbffczztzsttzsstddrqdqqchqccrlccfcwwghwhnhbhjbhhzrrgprrftrffqlljlslggzdzvvrgvgcgnnngtnggdcgddhjhchqcqfqwfwjffqppblbddgmdgmddrnddjtdjttgzgpzggwvwjvwwhdwwbvvtftcfttpftpfpzfznnchnhrrdtdbtdbdppsjsgsttptsptssnwntwnnsshqqgnnqnddhjjtqqjhhmghmhmsstrrhmmwvvlssprsrbbswsddbnntmtbmtbmmtmrrffvjffdrffnttbffbccgchghjgjwwshwswdswdsdsrdsdjdvjjgbjbssptpddzbdddqdpdspswssjrjwwcbbvsspnspslpplzlqlccvlvfllntlntnqnrqnqpqlqflfrfsfgsfswwptwwgqggrhghzghhrthtzhzsswhhzffpsffhnnrvnrvvhmmlvvqsslddhcddsllpmpggrhrcrbbmnmjmqmlmpmrrqwqhqrqhrrgrqqsrrpjpdjppzhphthddlzdzhddjvdjdcjcncnvnzzvwzvzgzjggcllvpllgdgqqdvvwnvwvwqqvwvvrbbtqqwhdztqfzzcqrshjzwqnpdsshmpjzwqdptbvfqzmfnbtlgbbsjbqgnblhbbpsfdzvcmpzfwczcnbdndsjzccjcqnrdglwfrvwtnjwpvpvvgwtmnpzhbwnbqwznmdvdrsjnlsfrpcnhlbmlgmrcjbbvhqnvbrmlnfttjllstqnqqnhqrzrhfqjbfbwfhhjzwtwzjmszzhjnjbhrlbnnpfvdmlftjnfsfnvddqfhqqlljrthptvmhbqrdmdcmljwgbrqrjwcrtmvjgqtblnslgbjmdsrrpgfsctrhwlwnszpljhrfnsfpcsgczzltgsztclhgcqljrcmbbpdlztncnrnrmgrttplcnldfqddqhznmcczbmwvsztmwmcqnrzmlmqchnhnhrrhhfntjzqcbnttspptqwvphlbtpfcbhdqzbhsbvhmsqbsdntwpcrnzvmbgqsgttbqhhblfjpmvfcrzhfnzwrzbzgsdfqndzzhfdnrvsnvfbptthjnhgljhrvwwrlbnfpvvjdjchcgbhfrqvszhrhqvtzplwsptvdhqwlzhcjpclmmrlccvgvtgsfpnjhqhrbqglznpdhmsqwwsbmhmlsmmvvghsmplqjchrfctltmnqnddzqjfpljwljbdqjcqdqzwsbcclqsmsmlstvljwwtfmpnhqzqfjghjfchjccqrchsvngvrnwfwttsnvrdlfvwfptsjcpslvvpmjclfcpljqjszptsgsmntzrdjbgrzmgvzddqrlsndjzzqbznqnphbnwfhtjjlwjpsvffrdrbsbttpgrvmqrdndqvlgzcpfbttvqdgvrmtvfclcbcwllthmdzjcflwpnrsqzrjdzbvqgzsqvjjpjjpnjtcjqhcfbjdqndlcwzhcbjtgtlvtdwctdnqcbcgsmrcrmwjntdwbjdbzmshbvlspjfdbvmlrbdzlmlggthvphnrqlrcdsqpsgqcmpgmgdzvdqlmcldvztpsbmpwjgjfhswplwrvwpbwbsgsvlhdvmpzwnnbwjwmshwcnqfqjdpchfjjcbdnslqchhnznpqpnnctznbtccclgjhmnngdjlmqnzpsdptqqcrblmrlnnpgvrfrtmbjnmspfrbwpclhgtbsghndrjfbggsplvcjnhjjbqzsfdpfnvchzjgbhdqgddfgddvzdcrjlntnsmscqwmpptqgbnvtsvpjvmhcfpbfrpzqbpfhlbjrmbmvdvvnvfqsndglvhfrqcsbsbbprscrbfthzcwcdrprqrwjzwrpblfllpwzlhmqvltjgpcjzpzwbltgwsrgrrhzcqfpvhcprdhnzcfphqrwcvtpcbppjwzmmwjhbvwbblnbwvcqzvlfzjhgmlnhlhrbsplfctggfbhbgwpncznvtmdtqqmjsvsnrlqswzvflrfsncgpdcndlwrfrqwqnqtjmsphwsgzhdjpnsdgrbrfhbfdrntwvgvbwnvwnrmdbhqgrglbfwprflnrljrwsgwtpgtmfhvvghtzndvwlzjchhmlwcncmpvrslrglzjcnhfdqhcrljhgbzpssvdnmfwzstmvrztgpsscfswltnbwrrtcnvbswmmjbmnnnvqwjzhprfnvlbvzzdvbwlwchrvqnwwpbnttbhfdvjjvzsznhczjcncmcrmwtrlsvbwpsrcwqdvgcfjsbqnwmjmtcgpnmcbfbcqhzrjbtlpvwzhjqqprbdnbgzfwlprlcspwjwnfftldqzbcgqnjtglvbpqffdvjbpslqcdzwdnmncvcwfshdhsmssttqfrsbnjgmhfqzlgrbpdfqtfdwslsgphfzzgbzjssfbgnwztzmczplqwjmhtlflpvqqqmrvlllhngtfgsvbbnvhzqbcgpmnlsmpwqwgqfjpzplzjhrslwzrsrgjgpppjlnhrnggcdzvspsztnschnqftgffbtvrpzndzpqmtsfmwgnrvpmtgpvnmqfmwgcvlznwqnjnjwpgnqfjwtdhhmztlvlcvrlzmlpmjdvdnzwbfsshfsvbbhqsmphjhqtlnvlsmvwlqvfqpnjnzlgmdvwzzrllmcgwtqdwphhbwmlrqhqrfmdvtqswvsllqvwmfbbpllsbjbvgsmrcgqvfgsnszfrdlcjbtfgcbclhmzlmqlnhmslcmgrcvjjlbpsjjcznzqwmztcgdgbmrlgwzjzzjrpndfrdzztzzgmsrcnwrvqrdcczrbhdpfjwvqsmbrcvllvjrrbrsqnzldltdgzscjrssvdhzhnvltpgfdfcvfbtqmphdzhpzgjhjbwsmdlbqqgcrhjrwhgvfgdllmmlnpsbtvdrrzmltfwgrcsfrrsdbdmjtrwhnlgcrgjgmbzvzvqbflvbrsqcssjgsvpjmlhtcggzwbvddmwwtfdrlltjqcpwnthczzlzdszvtmrmhbpcgstvrsnmbdcmjzsvnncmgmlnrzzhfvmblgptwwwbrmtcczjwcqmvdrsvfjgqqvghnhbntqcdrppfmvdzbcjvztrnpdhmdpmnvsnzzldvdfqbdrwqqqqsmswthwpjwdrflszbspqhpfwztjjcbdsrftdsrsfdltnfztcslmbsghgrtcscrfmptqplwpmtqdzthgfjhbqdnsffrpjmgczmrlfvzcjttwtmtqfbtlqrttvjdwhfgcgcclrlswmzhzbfhjrggnhwtnffnqqcvldlttvvgrbcqbmqzvtflfmdblhdbzphrqtbshvp
diff --git a/src/06.rkt b/src/06.rkt
new file mode 100644
index 0000000..27f6e0b
--- /dev/null
+++ b/src/06.rkt
@@ -0,0 +1,18 @@
+#lang racket
+
+(require "../lib.rkt")
+
+(define input (string->list (first (problem-input 6))))
+
+(define (search n)
+  (let loop ([buffer input]
+             [index n])
+    (if (= n (set-count (list->set (take buffer n))))
+        index
+        (loop (rest buffer) (add1 index)))))
+
+(define part1 (search 4))
+  
+(define part2 (search 14))
+
+(show-solution part1 part2)
\ No newline at end of file