a-a a-b a-i aaa aab aai aak aam aao aau ab- aba abb abi abk abm abo abu ai- aia aib aii aik aim aio aiu aka akb aki akk akm ako aku ama amb ami amk amm amo amu aoa aob aoi aok aom aoo aou au- aua aub aui auk aum auo b-u baa bab bai bak bam bao bau bba bbb bbi bbk bbm bbo bbu bi- bia bib bii bik bim bio biu bka bkb bkk bkm bko bma bmb bmi bmk bmm bmo bmu boa bob boi bok bom boo bou bua bub bui buk bum buo buu ia- iaa iab iai iam iao iau iba ibb ibi ibk ibm ibo ibu iia iib iii iim iio iiu ika ikb iki ikk iko iku im- ima imb imi imm imo imu io- ioa iob ioi iom ioo iou iu- iua iub iui ium ka- kaa kab kai kak kam kao kau kba kbb kbi kbk kbm kbo kbu kia kib kii kik kim kio kiu kkb kki kkk kkm kku kma kmb kmi kmk kmm kmo kmu koa kob koi kok kom koo kou kub kui kuk kum kuu m-o maa mab mai mak mam mao mau mba mbb mbi mbk mbm mbo mbu mi- mia mib mii mik mim mio miu mka mkb mkk mkm mko mku mma mmb mmi mmk mmm mmo mmu moa mob moi mok mom moo mou mua mub mui muk mum muu o-i oaa oab oai oak oam oao oau ob- oba obb obi obk obm obo obu oia oib oii oik oim oio oiu oka okb oki okk oko oku om- oma omb omi omm omo omu oo- ooa oob ooi ook oom ooo ou- oua oui ouk oum ouo ua- uaa uab uai uak uam uao uau uba ubb ubi ubk ubo ubu uia uib uii uim uio uiu uka ukb uki ukk uku um- uma umb umi umm umo umu uoa uob uok uom uoo uua uum uuu