a-a a-b a-z aaa aab aad aan aau aay aaz ab- aba abb abd abn abu aby abz ad- ada adb add adn adu ady adz an- ana anb and ann anu any anz au- aua aub aud aun auz ay- aya ayd ayn ayu ayz az- aza azb azd azn azu azy azz b-u baa bab bad ban bau bay baz bba bbb bbd bbn bbu bby bda bdb bdd bdu bdy bdz bna bnb bnd bnn bnu bnz bua bub bud bun buu buy buz by- bya byd byn byu byz bza bzd bzn bzu bzz daa dab dad dan dau day daz dba dbb dbd dbn dbu dby dbz dda ddb ddd ddn ddu ddy ddz dna dnb dnd dnn dny dnz dua dub dud dun duy duz dy- dya dyb dyd dyn dyu dyy dza dzb dzd dzu naa nab nad nan nau nay naz nba nbb nbd nbn nbu nda ndb ndd ndn ndu ndy nna nnb nnn nnu nnz nua nub nud nun nuu nuy nya nyd nyn nyu nyy nzb nzd nzz ua- uaa uab uad uan uau uay uaz uba ubb ubn ubu uby uda udb udd udn udu un- una unb und unn unu uny uua uun uuu uyu uza uzb uzu yaa yab yad yan yau yay yaz yby ybz yda ydn ydy yna ynd ynn ynu yny yua yud yun yuu yuy yyb yyu yyy yyz yzb yzu yzy zaa zab zad zan zay zaz zbb zby znd znn zub zud zun zuz zzy zzz