> debruijn.pl 3 3
AAACCCBCCACBBCBACABCAABBBABAA

> debruijn.pl 4 4
AAAADDDDCDDDBDDDADDCCDDCBDDCADDBCDDBBDDBADDACDDABDDAADCDCDBDCDADCCCDCCBDCCADCBCDCBBDCBADCACDCABDCAADBDBDADBCCDBCBDBCADBBCDBBBDBBADBACDBABDBAADADACCDACBDACADABCDABBDABADAACDAABDAAACCCCBCCCACCBBCCBACCABCCAACBCBCACBBBCBBACBABCBAACACABBCABACAABCAAABBBBABBAABABAAA

> debruijn.pl 4 2
AADDCDBDACCBCABBA

> debruijn.pl 5 2
AAEEDECEBEADDCDBDACCBCABBA