a-a a-b a-t a-z aaa aab aan aat aay aaz ab- aba abb abn abt aby abz an- ana anb ann ant any anz at- ata atb atn att atz ay- aya ayn ayt ayz az- aza azb azn azt azy azz baa bab ban bat bay baz bba bbb bbn bbt bby bna bnb bnn bnt bnz bta btb btn btt bty btz by- bya byn byt byz bza bzn bzz naa nab nan nat nay naz nba nbb nbn nbt nna nnb nnn nnt nnz nta ntb ntn ntt ntz nya nyn nyt nyy nzb nzz taa tab tan tat tay taz tba tbb tbn tbt tbz tna tnb tnn tnt tnz tta ttb ttn ttt tty tya tyn tyt tza yaa yab yan yat yay yaz yby ybz yna ynn yny yta ytn ytt yyb yyt yyy yyz yzb yzy zaa zab zan zat zay zaz zbb zbt zby znn zta zzt zzy zzz