a-a a-b a-c aaa aab aac aau ab- aba abb abc abu ac- aca acb acc acu au- aua aub auc b-u baa bab bac bau bba bbb bbc bbu bca bcb bcc bcu bua bub buc buu c-- caa cab cac cau cba cbb cbc cbu cca ccb ccc ccu cua cub cuc cuu ua- uaa uab uac uau uba ubb ubc ubu uca ucb ucc ucu uua uuc uuu

aaaa aaab aaac aaba aabb aabc aaca aacb aacc aacu abaa abab abac abau abb- abba abbb abca abcb abcc abua acaa acab acac acba acca accc accu acu- auaa auca baaa baba babb babu bac- baca bacc bau- bbau bbbb bcaa bcbc bcca bccc bcuc buba bubb bubu buca bucc bucu caaa caab caac caba cabu cac- caca cacc cauc cbac cbbc cbca cbcc cbcu ccaa ccab ccac ccba ccbc ccca cccb cccc cccu ccuc cuau cub- cubb cuca cucc uabc uaca uaua ubac ubba ucbc ucca ucua uuuu

-aaa- aabaa aabba aacbc abaab ababa ababu abaca abbac abccc acaca acacb acaua accub acuba babau bacab bacca bacu bubba bucca c-a-c ca-ca caaba cacau cacu cauac cauca ccccc cuaba cubub uuuuu

aaaaba abacab aucuba baabaa babacu bacaba bacau baucau bbbbbb bububu cabucu uacaba ucuuba

abacua bac-cab bau-bau bbbbbbb cauaua

bbbbbbbb bu-ba-bu

abbabubba baabaabaa

aaaaaaaaaaaaaaa bbbbbbbbbbbbbbb ccccccccccccccc