a-a a-b a-z aaa aab aah aas aay aaz ab- aba abb abh abs aby abz aha ahb ahh ahs ahy ahz as- asa asb ash ass asy asz ay- aya ayh ays ayz az- aza azb azs azy azz baa bab bah bas bay baz bba bbb bbh bbs bby bha bhb bhh bhs bsa bsb bsh bss bsy by- bya byh bys byz bza bzh bzs bzz haa hab hah has hay haz hba hbb hbh hbs hby hbz hha hhb hhh hhs hhy hhz hsa hsb hsh hss hsy hsz hy- hya hyb hyh hys hyy hzs hzy saa sab sah sas say saz sba sbb sbh sbs sby sh- sha shb shh shs shy ss- ssa ssb ssh sss ssz sy- sya syb syh sys sza yaa yab yah yas yay yaz ybs yby ybz yha yhs ysa ysb yss ysy ysz yyb yys yyy yyz yzb yzy zaa zab zah zas zay zaz zbb zbs zby zha zhs zsa zsh zsz zzs zzy zzz