-ol b-u bbb bbk bbl bbm bbo bbu bkb bkk bkl bkm bko blb blk bll blm blo blu bmb bmk bml bmm bmo bmu bob bok bol bom boo bou bub buk bul bum buo buu kbb kbk kbl kbm kbo kbu kkb kkk kkl kkm kku kl- klb klm klo klu kmb kmk kml kmm kmo kmu kob kok kol kom koo kou kub kuk kul kum kuu lbb lbk lbl lbm lbo lbu lkb lkl llb llk lll llm llo llu lmb lmk lml lmm lmo lmu lob lok lol lom loo lou lub luk lul lum luo luu m-o mbb mbk mbl mbm mbo mbu mkb mkk mkl mkm mko mku mlb mlk mll mlm mlo mlu mmb mmk mml mmm mmo mmu mob mok mol mom moo mou mub muk mul mum muu ob- obb obk obl obm obo obu okb okk okl oko oku olb olk oll olm olo olu om- omb oml omm omo omu oo- oob ook ool oom ooo ou- ouk oul oum ouo ubb ubk ubl ubo ubu ukb ukk ukl uku ulb ulk ull ulm ulo ulu um- umb uml umm umo umu uob uok uol uom uoo uum uuu