a-a a-b a-c aaa aab aac aaf ab- aba abb abc abf ac- aca acb acc acf af- afa afb afc aff baa bab bac baf bba bbb bbc bbf bca bcb bcc bcf bfa bfb bfc bff c-- caa cab cac caf cba cbb cbc cbf cca ccb ccc ccf cfa cfb cfc cff faa fab fac faf fba fbb fbc fbf fca fcb fcc fcf ffa ffc fff

aaaa aaab aaac aaaf aaba aabb aabc aaca aacb aacc aacf aafa aafb aafc aaff abaa abab abac abaf abb- abba abbb abca abcb abcc abcf abff acaa acab acac acba acca accc accf acfc afaa afca afcb afcc affa affc baaa baaf baba babb bac- baca bacc bafc baff bbbb bbfc bcaa bcbc bcca bccc bcfc bfca caaa caab caac caaf caba cac- caca cacc cafa cafb cafc caff cbac cbbc cbca cbcc cbfb cbfc ccaa ccab ccac ccaf ccba ccbc ccca cccb cccc cccf ccfa ccfc ccff cfaa cfab cfac cfbc cfca cfcb cfcf cffb faaa faac faba faca facc fafa fafc faff fcab fcba fcca fccf ffcc ffff

-aaa- aabaa aabba aacbc abaab ababa abaca abbac abccc abfab acaca acacb bacab bacca baffa c-a-c ca-ca caaba caffa ccccc fcaca

aaaaba abacab baabaa bacaba bbbbbb cafcaf

bac-cab bbbbbbb

bbbbbbbb

baabaabaa

aaaaaaaaaaaaaaa bbbbbbbbbbbbbbb ccccccccccccccc