b-u bbb bbi bbk bbm bbu bi- bib bii bik bim biu bkb bkk bkm bmb bmi bmk bmm bmu bub bui buk bum buu ibb ibi ibk ibm ibu iib iii iim iiu ikb iki ikk iku im- imb imi imm imu iu- iub iui ium kbb kbi kbk kbm kbu kib kii kik kim kiu kkb kki kkk kkm kku kmb kmi kmk kmm kmu kub kui kuk kum kuu mbb mbi mbk mbm mbu mi- mib mii mik mim miu mkb mkk mkm mku mmb mmi mmk mmm mmu mub mui muk mum muu ubb ubi ubk ubu uib uii uim uiu ukb uki ukk uku um- umb umi umm umu uum uuu