bbb bbi bbk bbm bbo bi- bib bii bik bim bio bkb bkk bkm bko bmb bmi bmk bmm bmo bob boi bok bom boo ibb ibi ibk ibm ibo iib iii iim iio ikb iki ikk iko im- imb imi imm imo io- iob ioi iom ioo kbb kbi kbk kbm kbo kib kii kik kim kio kkb kki kkk kkm kmb kmi kmk kmm kmo kob koi kok kom koo m-o mbb mbi mbk mbm mbo mi- mib mii mik mim mio mkb mkk mkm mko mmb mmi mmk mmm mmo mob moi mok mom moo o-i ob- obb obi obk obm obo oib oii oik oim oio okb oki okk oko om- omb omi omm omo oo- oob ooi ook oom ooo