b-u bbb bbg bbk bbm bbn bbu bgb bgg bgk bgm bgn bgu bkb bkg bkk bkm bkn bmb bmg bmk bmm bmn bmu bnb bng bnk bnn bnu bub bug buk bum bun buu gbg gbk gbm gbn gbu ggb ggg ggm ggn ggu gkb gkm gkn gmb gmg gmm gmn gnb gnm gnn gnu gu- gub gug guk gum gun guu kbb kbk kbm kbn kbu kgb kgm kgu kkb kkk kkm kkn kku kmb kmg kmk kmm kmu kn- kng knk knm knn knu kub kug kuk kum kun kuu mbb mbg mbk mbm mbu mgb mgk mgm mgn mgu mkb mkg mkk mkm mkn mku mmb mmg mmk mmm mmn mmu mnb mng mnk mnm mnn mnu mub mug muk mum mun muu nbb nbg nbk nbm nbn nbu ngb ngg ngk ngm ngn ngu nkk nkm nkn nku nmb nmg nmk nmm nmn nmu nnb nng nnk nnm nnn nnu nub nug nuk num nun nuu ubb ubg ubk ubn ubu ugb ugg ugk ugm ugn ugu ukb ukk ukn uku um- umb umg umm umn umu un- unb ung unk unm unn unu uug uum uun uuu