a-a a-b a-z aaa aab aak aar aas aay aaz ab- aba abb abk abr abs aby abz aka akb akk akr aks ar- ara arb ark arr ars ary arz as- asa asb ask asr ass asy asz ay- aya ayk ayr ays ayz az- aza azb azs azy azz baa bab bak bar bas bay baz bba bbb bbk bbr bbs bby bka bkb bkk bkr bks bra brb brk brr brs bry brz bsa bsb bsk bsr bss bsy by- bya byk byr bys byz bza bzr bzs bzz k-z ka- kaa kab kak kar kas kay kaz kba kbb kbk kbr kbs kbz kkb kkk kkr kks kky kra krk krr krs kry ksa ksb ksk ksr kss kya kyr kys kyz kzy ra- raa rab rak rar ras ray raz rba rbb rbk rbr rbs rkb rkk rks rky rkz rra rrb rrk rrr rrs rsa rsb rsk rsr rss ry- rya ryk ryr rys ryy ryz rza rzb rzy saa sab sak sar sas say saz sba sbb sbk sbr sbs sby sk- ska skb skk skr sks sky sr- sra srb srk srr srs sry ss- ssa ssb ssk ssr sss ssz sy- sya syb syk syr sys sza szr yaa yab yak yar yas yay yaz ybr ybs yby ybz yka ykk yra yrs ysa ysb ysk ysr yss ysy ysz yyb yys yyy yyz yzb yzr yzy zaa zab zak zar zas zay zaz zbb zbr zbs zby zka zks zrs zsa zsz zzr zzs zzy zzz