ckanky

http://contest.felk.cvut.cz/99cerc/data/inouts/words.in.gz

500 2 acb bac 2 bac acb 2 abc def 3 abc cba cba 4 abc cba abc abc 1 abcdefghijklmnopqrstuvwxyz 1 abeceda 2 2 26 aaaaaa baaabb caaacc daaadd eaaaee faaaff gaaagg haaahh iaaaii