a-a aaa aah aak aao aar aas aha ahh ahk aho ahr ahs aka akh akk ako akr aks aoa aoh aok aoo aor aos ar- ara arh ark aro arr ars as- asa ash ask aso asr ass haa hah hak hao har has hha hhh hhk hho hhr hhs hka hkh hkk hko hkr hks hoa hoh hok hoo hor hos hr- hra hrh hrk hro hrr hrs hsa hsh hsk hsr hss ka- kaa kah kak kao kar kas kha khh khk kho khr khs kkh kkk kkr kks koa koh kok koo kor kos kra krk kro krr krs ksa ksh ksk kso ksr kss oaa oah oak oao oar oas oha ohh oho ohr ohs oka okk oko okr oks oo- ooa ooh ook ooo oor oos or- ora orh ork oro orr ors os- osa osh osk oso osr oss ra- raa rah rak rao rar ras rh- rha rhh rho rhr rhs rkk rko rks roa roh rok roo ror ros rra rrh rrk rrr rrs rsa rsh rsk rso rsr rss saa sah sak sao sar sas sh- sha shh shk sho shr shs sk- ska skh skk sko skr sks soa soh sok soo sor sos sr- sra srh srk sro srr srs ss- ssa ssh ssk sso ssr sss