a-a a-b a-i aaa aab aai aak aam aao ab- aba abb abi abk abm abo ai- aia aib aii aik aim aio aka akb aki akk akm ako ama amb ami amk amm amo aoa aob aoi aok aom aoo baa bab bai bak bam bao bba bbb bbi bbk bbm bbo bi- bia bib bii bik bim bio bka bkb bkk bkm bko bma bmb bmi bmk bmm bmo boa bob boi bok bom boo ia- iaa iab iai iam iao iba ibb ibi ibk ibm ibo iia iib iii iim iio ika ikb iki ikk iko im- ima imb imi imm imo io- ioa iob ioi iom ioo ka- kaa kab kai kak kam kao kba kbb kbi kbk kbm kbo kia kib kii kik kim kio kkb kki kkk kkm kma kmb kmi kmk kmm kmo koa kob koi kok kom koo m-o maa mab mai mak mam mao mba mbb mbi mbk mbm mbo mi- mia mib mii mik mim mio mka mkb mkk mkm mko mma mmb mmi mmk mmm mmo moa mob moi mok mom moo o-i oaa oab oai oak oam oao ob- oba obb obi obk obm obo oia oib oii oik oim oio oka okb oki okk oko om- oma omb omi omm omo oo- ooa oob ooi ook oom ooo