diff --git a/day6/Cargo.lock b/day6/Cargo.lock
new file mode 100644
index 0000000..a16c0bf
--- /dev/null
+++ b/day6/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day6"
+version = "0.1.0"
diff --git a/day6/Cargo.toml b/day6/Cargo.toml
new file mode 100644
index 0000000..89d04ae
--- /dev/null
+++ b/day6/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day6"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day6/input.txt b/day6/input.txt
new file mode 100644
index 0000000..e92addc
--- /dev/null
+++ b/day6/input.txt
@@ -0,0 +1 @@
+zcncrcnrrlccmhchssgqsqrsstfffnqfnfsswgwjjcmcnnvjvwjvwvfvnvwwhvvwmwhmwwwhbhhldhdmhhdfdbdfbdblllnfllgslllqhlhfhlhqllncnfnsffwmwzzlglzlwlhwwmvmddpvvbrvrdvrdvdhhzdhdpdzzbgbsssrpsrshrshhbqbgbmmtwwcbcrbbvnvhnncscwcwlcwlwnwswbbnwntthzzdlzdzffvqvdqvvtptdptphpddzzvhzvzwwqgqjjjvsspvspsbsffvpvcvjcvjvrvjjgmjjhrrdhhdvhvttjttzptpssnlnjjlnnhmnndjnjwwtjjtbbfflwfwgwvvpjpwpcwcgglmgmdmnmbbqtqctcwcmwwvmvlmvmdvdvhvlhlzhzttghttnvnjntnqqtmtwwhvhrhfhchqchhdrdllnwnfwfjjmsmmnhhshnhpptstjjpnpzzhmmpssgrsrzsrrffzjjhvjhjcjcpcvpccfnfjnfjfllssrdsdnnmffldldppcctcmtctffprpsrrrfhfmflldccnpppvsswppdgpgjpgpqgpqpjppclcjczcnzzzqvzzwlzzqfzffsqqphqhvqqbcccstsdttwcwcvvmjjhqqmllpglgtgwgnnbnrbnnjdndhhbrbvrvwwwblwwwppmdmttztqzqrqjjpggpmgpmpqqmssvnsvnndnvddtztddrrsnsbbshhqmhqmmdnnrsrllqvvfjfpfqpqfqflqlmqmrrqgrqrrhvvfddfhhfnhnlncnzzwwjwswpsscpchcssrzssjqsqrsswbbzggnqnwqqsrqqzbqbddtffcjjdggwlwnwtnnpddcqddsppcwpcwpphvphhhrprqrqttwgwqwppvdpvvrgggmpmddzvvwwthwtttbqtbbftfrffbdfbbspshphpwhppnhnmhhbbshbsbmbdmmtrmrbrprbprphhnmhmvhmhhqqbvqvqcvcwcbwcchbbgwwqffrcffsvvcczrztrzzdhdmhdmmzbbvlvqqtptpvvfsfppdzppmddfvdfdwdfdmdwwlvvqdvqdqmdqqmnmdndsswsfwfvwfwzzhrzhhwfhhpvhppmssnhsnsnwswvwlwdwzwnwswwmqmjmbbdjdbbtllcpllltqlttnvvppznpnttlrrwlwvllphpbblccgjcggbtbwtwdwrrbnndpddbqqnpnrnnqqshspsggtptztpzzclcggtqtgqttcmmbgbfbdfdfsddlrlvrlvvmqqgbqgbqbcbbnpplqqblqbqmbbbdqbbhjjcgcdgdwdjwjqqlsqqnnwffglfglgnlggjgjtgjtgjtgjjclcwcqqvpvwwvgvhgvhvjjzpzbznnvrrrpbpdbdhhmshsnnnwppcbcvvlldccdggqnqgnqqzbzzcfflnnmppcgcmgmrgmrgmgngwwptpzzpfzpfzpzdppgcgtcgtgccvtctzzdmzmlmzlzwllbplblltgtctrrghgvhgvvfvssngsschshrhvrvddghgwwwwzgwgvgccjdjzjwwvdvvqsqshsvvddmddbllvppmlpmlmwlwppjmppwrrdzrrpmrmrdmrmbmzzwttvwwsfswwlflnlrlvvdllzbztbtpbtppnjpnpdnnjrjsshtssvvsjvjfjwffsszvsvjssqzsslpslppjpspqptbncvzrlwtjvsrwtnzzhwdfsmlthvgqgjrpshpbsrrvnsdbqslbcplnpcjqwmwqsnwdcjsdmccbdglwbrcdcqsfhjqhstvhqqdwltqwhhqcrnpvnzjhhbjvqbqhclwggjqfvnfsvcnjjhbmrvbpjqrbljbtltvnsgdfhddlmsdhcrfwvlvbsdrjwjvtnqzhrlqgjmzsmjlpdjsrjmdhmvgwjmfwtqffnzfrtswrlgvvhhqgpzcjwscfqgjmdhtvbgzdlvzfhgqlqbfwsjrmmhrlcwhrcnwwvngcmsrfgczsfqvvmdtmtprfvjrwrwcqwvgmzcjncrzvcswlzsdszvdtwmptnrhgzqwrhjjtbchhpwsdjnqmnsgzwqzvlzlsznpqgvtqnldjqpvndtsjlzhpzsgthbwvwnlbwjlmndqpcdvjdgdzhctpghlfwrtqtvfwdpgrjbmwzqgthjpmlrsqmzsznddhrbjnggqrdntpbngvldnnltfnmdwfhftjvpqbrzqvdzbzzctshzldtcdgfnczglrrjtwswzdvjrfgwztwznbpplmbgwpcmstcsjtqhmzmzsjwsfbjlbnbdtdsmlpdmrrbhdhpzrjdpzhcwsrgfrhmqzqtjfhpvltnthwjrrrpnsbmmwrhsfqbmnvwhpntltsgwgnqhcvlndfrtrfrnlmbhltmtgzhlzqgtsbbnggdjvbslfbczhpghqqcqlrbtpnbqbflfjrmpmwwvjqgvcqtmfggmptqlqstcmdtqlslnnzwbgnstftfsvsjdrmgbzfnzltwbjmqhsvshnmwhftjdndltdpngzwbrjpgpwmqgfsflnhmtzcmdjmzwrsrrrmpvwgggwrhrwtfwdbgbpmwpcdspdtbqvdwwsnwdtrtdtgnfzzsmlbcqdzbsqnrgtvvnlfcdlcgcnfpqbddqcjfqtmpndmnwvfqgjzrltqvlprmbbhmtwbzjjgfhhhfjswpffmjnsdmrcjrwlwpmfrmhljpphlwwwwmgsjcsrcvmfrdjdhshddshpplzsnsphcmdhvllgmdgrvbvjmtpltdthffsvwwhvgqrhmfjfpdswcqldrhpmznffjsntwrnmnpmsshljszbchctptsdlnbcvpfvtlfnzcrljpdwrsjnlpqcpnwvnqhzhqmjbvlbtgslzthlbbjzsgdglbrltzjdshpfbndjtssvsjqlstnrjdzzjvlpqhmwvrsvndcqrqjjcsqvmvrbhngtcfdprlbnqmhqllddgjpdzbjlphntrtgjrdgtbslrtzczbnnlddzzsvqvqvvzjpjqfhztgtsfggdppfdhzsbjzqjmpnmgqzlsdhjjbfpbsbnzpmhwrzjqhczrgcsflfwtrgwbnbrshjpwltntsnsdhmhqlmzdprcrcpcpjnphsmjwhzdqtncdbwgspmnfzsgmpbdhmslqchhhbbwfrghhnfjplsvrtbvplgrwdnbnfsgpwrqczvzlnfsngnsnbwvpmfdcmjztdnrllslnwcfwwnwsvztqmgqtfvmdqrrrmwfmphbcvwwttpmwjjbvqrmlwtwfsjdpcbmdlnlzcqntfzzmslshwprjfhwwpbbdfcdjwllfwcznwpjpwrlsfnnbgzjllrgtzcdcvhdhbtlrcvfdvsdjlzsmwwqvpzfhzjlqpfbqstvfrpcchmtwgbrhqqbglrvzmctdlpnvmglgdtzpbdngtfdnmsmwbgjstzbqwqcdlhfrtqqnhqvpfhdrjqvsvstftdgwwnwpfbfbdcfqnqlwpdnfhhfctwrgdqpbpbmgnfsnbpjfctvdtjnsfqlrtctrnjgltndngcmrdphhsqpjhprbngjzqqhnhhrdwlwwpmhzwshvrtzfgzlrhwghvpvfprbbvflltplpptvrmwcrdqndfqbfqtlqqwvphsmcvnbzghvsptrphhfcgdsslhfbcwhtjcmnpbvqrfgpsjgqpnnwwhjjwqrhhqgznwdzjqbtmmjljjwctqtfgwqbdrjwqwbbcftvjwfdfrgvsrlcrccpvfzdrcjvqfbhddpvrrhjrmhdgchrghbzsqpmgnmslfctblwlvphdfpvtdtwpdfsjwssmgnsvsqpdbqngccsplhmjbwjwtzwsbjhwpwcslqjdchmbvzrbgnwvjrrrdtvhtlzlrbwthzlhhqzzpvpwbzrrbrbtpwnhldhqqltqrqdddfwdmjzgctnlrjrjwvddfmjpnptdmrvnqjvsjfrmlvlqsthhsbvnjlsdzrjngfnqdjfssmvgrchbwmwbbvfqfhvrtwghmrpddnwbrbvbmqvfzbjdsnbzgrtmsfhmsmjtrqsgmpnwwbfwtp
diff --git a/day6/src/main.rs b/day6/src/main.rs
new file mode 100644
index 0000000..70f1932
--- /dev/null
+++ b/day6/src/main.rs
@@ -0,0 +1,26 @@
+use std::env;
+use std::fs::File;
+use std::io::{BufReader, Read};
+
+fn main() {
+    let file = File::open(&env::args().nth(1).unwrap()).unwrap();
+    let reader = BufReader::new(file);
+
+    let (mut x1, mut x2, mut x3) = (0, 0, 0);
+    let mut i = 0;
+    for byte in reader.bytes() {
+        i += 1;
+        let c = byte.unwrap();
+        if c != x1 && c != x2 && c != x3
+                && x1 != x2 && x1 != x3 && x2 != x3
+                && x1 != 0 {
+            println!("{}", i);
+            break;
+        } else {
+            x1 = x2;
+            x2 = x3;
+            x3 = c;
+        }
+    }
+}
+
diff --git a/day6/test.txt b/day6/test.txt
new file mode 100644
index 0000000..7980a82
--- /dev/null
+++ b/day6/test.txt
@@ -0,0 +1 @@
+mjqjpqmgbljsphdztnvjfqwrcgsmlb