aaabbabbaacbbccccccaacacbbabaabcccacabbbccbbcacaaaabaababcaaacabbccccccacabaabacbccbabcabacacaacbbbaabacccccbcccccbaaabccbbcabcacbaacbbcacbacaacaabccbbcbcababbcacacbcbcabacaccbbbabbbcaccacabcabbccbcabcaabbabccacacabccbbbcacbaaabbbcabaacbabcbccabacaacccbbbcbabcbaabccacaccabcbbbabacababbcbbcacbacaaaabacabaaaaacbbcccccaacbbccaaacaaabcbbaacacbcabbabbabbbbcabbcccccccabcaaccbbcaabababbcabbacbacabbabaaabbbacacabcbbbacaaabbbbabbbcacacabcccccbbababbcbaaccbbbbabcbbcbaaccabbacbcaaaabcabbaacbbaacbaacaacbbcbacaccacbcbbabaaaccccbcbcacacbccaacbaabcacbbbaaacacbbccbaacbabccbacbbcccaccccaccbbbbaabacbbbaaaababacacbcbbcaaaccabacbcacababccaabaabbcacaccabaccaacbbaacccccbabcabcbcaccbcbabcaaccaacbcabccaaabbbccbbcacacacaaaaabccaaabcaacbabcabbcbbccbabaaabcabcbcaccbcbcbcccababbacacacbcaacbbaaabbbcbbbbbaabbbaacbcaacabbbabcbbbacccaaacbabcbbccbabcabbbbccccaacaaaaaabaabaccbcaabacbbcbcbabaaabcababbababbcaaaacccacabcabbaccccbaacabcacabbaaabbccacaababccaaacbacbbccbacbcbbbbaacabcbbaccbabbaaaabaabcbccbbacacbabacbaaacbacbbaaacccacabbaabbacbaaaaaacaabbbcaacabcccbccabbaacacbaaccbbcacbaabccbbbcbbbacbacacaabcbaaababbbcbacaaccabccaaaabbcacabacbcaaaccaacbacaaabacbcabcabbcbbcaabccccbbbcaaababbbbbbbaacacbcccbacabbcbcaacacbabacabacccbacaccacaccabccaaaccccbccbaacabccacabcaabcbaabbccaacbabccacacbcabbcbbbbccaccbccccccaabbacbcbcacccaaaaaababccbaccbacbcaccbbbaaacacaacaabbcaaaaabcabbbccbbbaaabccbbccccaacbaaabbbbbbccacbbbcccbcacacbaabbbababaccccbbabbccbaccacacbbaaabcbbaaaccbabcaabbbaaabcbcbcababcbabbabbcacacbabaacccaacabaabbbabacbbbccbbbacbaabcacabcabbbccccbbbcbaabaaaaacaaabbccacaaabbacbcccbacaabacaaaaaababbcbacaccbbcbbacbbcaacaaaacbccbcabababbbcacaaacbccccbbcacbcbaccaacccaaabccabcbabcabbbbacbcccbcabcabcbacbacccabcbbbcbbbccabbbbcbcabcccbbcabcaaaccbccbaabcbcbcacabcabacacaaaaaabbcabccabccbacbaaaaaaccbcacaacbaccaaaabbcabacbbcbccaccbbcaabaabcaabaacababbbacbcaabbaccbccccaaacbabaacacbabacaccccccaabcccbcabbabaaccaaababbaacbabbaabcccbaacbaacbabbcabacccabcbbcbbcacabccbacbababbbccaaabbacabacacaabbabbbbccacabcbbbbcbcabbabbbcbbaa
2030606397472788
