a-a a-b aaa aab aah aak aao aar aas aay ab- aba abb abh abk abo abr abs aby aha ahb ahh ahk aho ahr ahs ahy aka akb akh akk ako akr aks aoa aob aoh aok aoo aor aos ar- ara arb arh ark aro arr ars ary as- asa asb ash ask aso asr ass asy ay- aya ayh ayk ayo ayr ays baa bab bah bak bao bar bas bay bba bbb bbh bbk bbo bbr bbs bby bha bhb bhh bhk bho bhr bhs bka bkb bkk bko bkr bks boa bob boh bok boo bor bos boy bra brb brh brk bro brr brs bry bsa bsb bsh bsk bso bsr bss bsy by- bya byh byk byo byr bys haa hab hah hak hao har has hay hba hbb hbh hbk hbo hbr hbs hby hha hhb hhh hhk hho hhr hhs hhy hka hkb hkh hkk hko hkr hks hoa hob hoh hok hoo hor hos hoy hr- hra hrb hrh hrk hro hrr hrs hsa hsb hsh hsk hsr hss hsy hy- hya hyb hyh hyo hyr hys hyy ka- kaa kab kah kak kao kar kas kay kba kbb kbh kbk kbo kbr kbs kha khh khk kho khr khs kkb kkh kkk kkr kks kky koa kob koh kok koo kor kos koy kra krk kro krr krs kry ksa ksb ksh ksk kso ksr kss kya kyo kyr kys oaa oab oah oak oao oar oas ob- oba obb obh obk obo obr obs oby oha ohh oho ohr ohs oka okb okk oko okr oks oo- ooa oob ooh ook ooo oor oos or- ora orb orh ork oro orr ors ory os- osa osb osh osk oso osr oss oya oyo oys ra- raa rab rah rak rao rar ras ray rba rbb rbh rbk rbo rbr rbs rh- rha rhb rhh rho rhr rhs rkb rkk rko rks rky roa rob roh rok roo ror ros roy rra rrb rrh rrk rrr rrs rsa rsb rsh rsk rso rsr rss ry- rya ryk ryo ryr rys ryy saa sab sah sak sao sar sas say sba sbb sbh sbk sbo sbr sbs sby sh- sha shb shh shk sho shr shs shy sk- ska skb skh skk sko skr sks sky soa sob soh sok soo sor sos soy sr- sra srb srh srk sro srr srs sry ss- ssa ssb ssh ssk sso ssr sss sy- sya syb syh syk syr sys yaa yab yah yak yao yar yas yay ybr ybs yby yha yhs yka ykk yob yok yoo yor yos yoy yra yro yrs ysa ysb ysk yso ysr yss ysy yyb yys yyy