53
ccbababbc cbcc ccbbbbcaac cbcbbaabaacaaaaccac bbab abccbacccaccbbc aaaabbbcaababaaa acbabbca cabbacbabcccc aaaccccacaaa bbbbabcabcbcbac bbbaa bacbba bbbbacb a bbccaacacbccaca bccabccabacbcabbbcc cabcacbbaaaca aabcccabbbbc abcacbbcababc aabbacbbcacabca a bccbaaaacabaaccbbc cacabacaaaacc cbccacacbcb aabccbaccbb acabcabccbcccaaabcac cccaccb abaacbaabccbcccbc abcccaabbca cabacbcaccac bcccbbaacabab bbbcbbc baabcb bbacbb bacac aabaaccb abaabacbaacabcba cacaaa aca ab cbcaacccaabbbcbbaaba babaabcaaaaaabcabbcb accbcaaccaaaccaabb ccbac acacbcacabbaca bbcb bbacaaacbcacabcbba accacccccabbbacbc cbaccabbaabcaccbaa bbccbbb a cab