7 49
BDBBAAA CABADDA ADBABB DDDAABB DBAAAB DAABAAD DACAAA CDADAAB AAACAAC AAAAAAA AAAAACD ADACAAA AAAADCA ABAAAAA DAADABA ACACAAB ABDAAD CAABDBA BADDAA AADBDAB AADAACA BAABDAC DBABADB CDCCAAA AACCCAA AADBCAA BADCABA BAABDA BAABAAB AADBAAA DDBAACA ACDAAAC AAAAAA AAAAAAB AADAAAA DDAAAAA AAAACAA DCABAAA ADBDAAD AAABAAA AACABAD AAAAAAA AADAAA AADBDAD AADBBAA DAABADB AAAACAA CDDDDAA BAAAAAA 
AAAACAD AAAADCC DADABA DADAABD AAADCA BDDAAAA ACADAA DAADADC AAAAAAA BAAABAA ABAAAAA ADDDAAC AABAABB DAAACAC BAAAABA BABACAA AAAABB AADADAA AAAABA BDAAAAA AADADAA DDAACCD ABAADAA DABAAAB BDCAADB ABDDBAB ABAAADA AAABAB ADABAAA DAACAAA AABADAB ADAACAB AAAAAA AABACAB ABACCBA ADAAADA AABABAA ADAAADD AAADAAD AADADBA BAAAAAB ABDCAAB AAADBA CADBABD BAADDBD AABADAC AAAAAAD DBADDAA ADAAACD