a-a aaa aak aao aar aas aay aka akk ako akr aks aoa aok aoo aor aos ar- ara ark aro arr ars ary as- asa ask aso asr ass asy ay- aya ayk ayo ayr ays ka- kaa kak kao kar kas kay kkk kkr kks kky koa kok koo kor kos koy kra krk kro krr krs kry ksa ksk kso ksr kss kya kyo kyr kys oaa oak oao oar oas oka okk oko okr oks oo- ooa ook ooo oor oos or- ora ork oro orr ors ory os- osa osk oso osr oss oya oyo oys ra- raa rak rao rar ras ray rkk rko rks rky roa rok roo ror ros roy rra rrk rrr rrs rsa rsk rso rsr rss ry- rya ryk ryo ryr rys ryy saa sak sao sar sas say sk- ska skk sko skr sks sky soa sok soo sor sos soy sr- sra srk sro srr srs sry ss- ssa ssk sso ssr sss sy- sya syk syr sys yaa yak yao yar yas yay yka ykk yok yoo yor yos yoy yra yro yrs ysa ysk yso ysr yss ysy yys yyy