Loop of length 24 starting with a string of length 8 found after enumerating 27933 derivations: .ca.aaaaaa rule ca -> aabc at position 0 .aabc.aaaaaa rule ca -> aabc at position 3 .aabaabc.aaaaa rule a -> at position 3 .aababc.aaaaa rule a -> at position 3 .aabbc.aaaaa rule ca -> aabc at position 4 .aabbaabc.aaaa rule bba -> ac at position 2 .aaacabc.aaaa rule ca -> aabc at position 6 .aaacabaabc.aaa rule a -> at position 6 .aaacababc.aaa rule a -> at position 6 .aaacabbc.aaa rule ca -> aabc at position 7 .aaacabbaabc.aa rule bba -> ac at position 5 .aaacaacabc.aa rule ca -> aabc at position 6 .aaacaaaabcbc.aa rule ca -> aabc at position 11 .aaacaaaabcbaabc.a rule a -> at position 11 .aaacaaaabcbabc.a rule a -> at position 11 .aaacaaaabcbbc.a rule ca -> aabc at position 12 .aaacaaaabcbbaabc. rule bba -> ac at position 10 .aaacaaaabcacabc. rule ca -> aabc at position 9 .aaacaaaabaabccabc. rule a -> at position 9 .aaacaaaababccabc. rule a -> at position 9 .aaacaaaabbccabc. rule ca -> aabc at position 11 .aaacaaaabbcaabcbc. rule ca -> aabc at position 10 .aaacaaaabbaabcabcbc. rule bba -> ac at position 8 .aaacaaaaacabcabcbc. rule ca -> aabc at position 9 .aaacaaaaaaabcbcabcbc.