a-a a-b a-t a-z aaa aab aan aas aat aay aaz ab- aba abb abn abs abt aby abz an- ana anb ann ans ant any anz as- asa asb asn ass ast asy asz at- ata atb atn ats att atz ay- aya ayn ays ayt ayz az- aza azb azn azs azt azy azz baa bab ban bas bat bay baz bba bbb bbn bbs bbt bby bna bnb bnn bns bnt bnz bsa bsb bsn bss bst bsy bta btb btn bts btt bty btz by- bya byn bys byt byz bza bzn bzs bzz naa nab nan nas nat nay naz nba nbb nbn nbs nbt nna nnb nnn nns nnt nnz nsa nsb nsn nss nst nsy nsz nta ntb ntn nts ntt ntz nya nyn nys nyt nyy nzb nzs nzz saa sab san sas sat say saz sba sbb sbn sbs sbt sby sna snb snn sns snt sny ss- ssa ssb ssn sss sst ssz sta stb stn sts stt sty stz sy- sya syb syn sys syt sza taa tab tan tas tat tay taz tba tbb tbn tbs tbt tbz tna tnb tnn tns tnt tnz tsa tsb tsn tss tst tsy tta ttb ttn tts ttt tty tya tyn tys tyt tza tzs yaa yab yan yas yat yay yaz ybs yby ybz yna ynn yns yny ysa ysb yss yst ysy ysz yta ytn yts ytt yyb yys yyt yyy yyz yzb yzy zaa zab zan zas zat zay zaz zbb zbs zbt zby znn zns zsa zst zsz zta zzs zzt zzy zzz