a-a a-b a-z aaa aab aan aas aay aaz ab- aba abb abn abs aby abz an- ana anb ann ans any anz as- asa asb asn ass asy asz ay- aya ayn ays ayz az- aza azb azn azs azy azz baa bab ban bas bay baz bba bbb bbn bbs bby bna bnb bnn bns bnz bsa bsb bsn bss bsy by- bya byn bys byz bza bzn bzs bzz naa nab nan nas nay naz nba nbb nbn nbs nna nnb nnn nns nnz nsa nsb nsn nss nsy nsz nya nyn nys nyy nzb nzs nzz saa sab san sas say saz sba sbb sbn sbs sby sna snb snn sns sny ss- ssa ssb ssn sss ssz sy- sya syb syn sys sza yaa yab yan yas yay yaz ybs yby ybz yna ynn yns yny ysa ysb yss ysy ysz yyb yys yyy yyz yzb yzy zaa zab zan zas zay zaz zbb zbs zby znn zns zsa zsz zzs zzy zzz