a-a a-b a-i aaa aab aah aai aak aao ab- aba abb abh abi abk abo aha ahb ahh ahi ahk aho ai- aia aib aih aii aik aio aka akb akh aki akk ako aoa aob aoh aoi aok aoo baa bab bah bai bak bao bba bbb bbh bbi bbk bbo bha bhb bhh bhi bhk bho bi- bia bib bih bii bik bio bka bkb bkk bko boa bob boh boi bok boo h-i haa hab hah hai hak hao hba hbb hbh hbi hbk hbo hha hhb hhh hhi hhk hho hia hib hih hii hik hio hka hkb hkh hki hkk hko hoa hob hoh hoi hok hoo ia- iaa iab iah iai iao iba ibb ibh ibi ibk ibo iha ihb ihh ihi ihk iho iia iib iih iii iio ika ikb iki ikk iko io- ioa iob ioh ioi ioo ka- kaa kab kah kai kak kao kba kbb kbh kbi kbk kbo kha khh khi khk kho kia kib kih kii kik kio kkb kkh kki kkk koa kob koh koi kok koo o-i oaa oab oah oai oak oao ob- oba obb obh obi obk obo oha ohh ohi oho oia oib oii oik oio oka okb oki okk oko oo- ooa oob ooh ooi ook ooo