b-u bbb bbf bbi bbk bbm bbu bfb bff bfi bfm bfu bi- bib bif bii bik bim biu bkb bkf bkk bkm bmb bmf bmi bmk bmm bmu bub buf bui buk bum buu fbb fbf fbi fbk fbm fbu fff ffi ffk ffm ffu fib fif fii fik fim fiu fkb fkf fki fkk fkm fmb fmf fmi fmm fmu fub fuf fui fuk fum fuu i-f ibb ibf ibi ibk ibm ibu ifb iff ifi ifm ifu iib iif iii iim iiu ikb ikf iki ikk iku im- imb imf imi imm imu iu- iub iui ium kbb kbf kbi kbk kbm kbu kff kfi kfm kfu kib kif kii kik kim kiu kkb kki kkk kkm kku kmb kmf kmi kmk kmm kmu kub kui kuk kum kuu m-f mbb mbf mbi mbk mbm mbu mfb mff mfi mfm mfu mi- mib mif mii mik mim miu mkb mkk mkm mku mmb mmf mmi mmk mmm mmu mub muf mui muk mum muu ubb ubf ubi ubk ubu uff ufi ufm ufu uib uif uii uim uiu ukb ukf uki ukk uku um- umb umf umi umm umu uum uuu