a-a a-b aaa aab aah aak aas aay ab- aba abb abh abk abs aby aha ahb ahh ahk ahs ahy aka akb akh akk aks as- asa asb ash ask ass asy ay- aya ayh ayk ays baa bab bah bak bas bay bba bbb bbh bbk bbs bby bha bhb bhh bhk bhs bka bkb bkk bks bsa bsb bsh bsk bss bsy by- bya byh byk bys haa hab hah hak has hay hba hbb hbh hbk hbs hby hha hhb hhh hhk hhs hhy hka hkb hkh hkk hks hsa hsb hsh hsk hss hsy hy- hya hyb hyh hys hyy ka- kaa kab kah kak kas kay kba kbb kbh kbk kbs kha khh khk khs kkb kkh kkk kks kky ksa ksb ksh ksk kss kya kys saa sab sah sak sas say sba sbb sbh sbk sbs sby sh- sha shb shh shk shs shy sk- ska skb skh skk sks sky ss- ssa ssb ssh ssk sss sy- sya syb syh syk sys yaa yab yah yak yas yay ybs yby yha yhs yka ykk ysa ysb ysk yss ysy yyb yys yyy