a-a a-b a-i aaa aab aah aai aak aao aar aas ab- aba abb abh abi abk abo abr abs aha ahb ahh ahi ahk aho ahr ahs ai- aia aib aih aii aik aio air ais aka akb akh aki akk ako akr aks aoa aob aoh aoi aok aoo aor aos ar- ara arb arh ari ark aro arr ars as- asa asb ash asi ask aso asr ass baa bab bah bai bak bao bar bas bba bbb bbh bbi bbk bbo bbr bbs bha bhb bhh bhi bhk bho bhr bhs bi- bia bib bih bii bik bio bir bis bka bkb bkk bko bkr bks boa bob boh boi bok boo bor bos bra brb brh bri brk bro brr brs bsa bsb bsh bsi bsk bso bsr bss h-i haa hab hah hai hak hao har has hba hbb hbh hbi hbk hbo hbr hbs hha hhb hhh hhi hhk hho hhr hhs hia hib hih hii hik hio hir his hka hkb hkh hki hkk hko hkr hks hoa hob hoh hoi hok hoo hor hos hr- hra hrb hrh hri hrk hro hrr hrs hsa hsb hsh hsi hsk hsr hss ia- iaa iab iah iai iao iar ias iba ibb ibh ibi ibk ibo ibr ibs iha ihb ihh ihi ihk iho ihr ihs iia iib iih iii iio iir iis ika ikb iki ikk iko ikr iks io- ioa iob ioh ioi ioo ior ios ir- ira irb iri irk iro irr irs is- isa isb ish isi isk iso isr iss ka- kaa kab kah kai kak kao kar kas kba kbb kbh kbi kbk kbo kbr kbs kha khh khi khk kho khr khs kia kib kih kii kik kio kir kis kkb kkh kki kkk kkr kks koa kob koh koi kok koo kor kos kra kri krk kro krr krs ksa ksb ksh ksi ksk kso ksr kss o-i oaa oab oah oai oak oao oar oas ob- oba obb obh obi obk obo obr obs oha ohh ohi oho ohr ohs oia oib oii oik oio oir ois oka okb oki okk oko okr oks oo- ooa oob ooh ooi ook ooo oor oos or- ora orb orh ori ork oro orr ors os- osa osb osh osi osk oso osr oss ra- raa rab rah rai rak rao rar ras rba rbb rbh rbi rbk rbo rbr rbs rh- rha rhb rhh rhi rho rhr rhs ria rib rih rii rik rio rir ris rkb rkk rko rks roa rob roh roi rok roo ror ros rra rrb rrh rri rrk rrr rrs rsa rsb rsh rsi rsk rso rsr rss saa sab sah sai sak sao sar sas sba sbb sbh sbi sbk sbo sbr sbs sh- sha shb shh shi shk sho shr shs sia sib sih sii sik sio sir sis sk- ska skb skh ski skk sko skr sks soa sob soh soi sok soo sor sos sr- sra srb srh sri srk sro srr srs ss- ssa ssb ssh ssi ssk sso ssr sss