b-u bbb bbi bbk bbm bbo bbr bbu bi- bib bii bik bim bio bir biu bkb bkk bkm bko bkr bmb bmi bmk bmm bmo bmr bmu bob boi bok bom boo bor bou brb bri brk brm bro brr bru bub bui buk bum buo bur buu ibb ibi ibk ibm ibo ibr ibu iib iii iim iio iir iiu ikb iki ikk iko ikr iku im- imb imi imm imo imu io- iob ioi iom ioo ior iou ir- irb iri irk irm iro irr iru iu- iub iui ium iur kbb kbi kbk kbm kbo kbr kbu kib kii kik kim kio kir kiu kkb kki kkk kkm kkr kku kmb kmi kmk kmm kmo kmu kob koi kok kom koo kor kou kri krk kro krr kru kub kui kuk kum kur kuu m-o m-r mbb mbi mbk mbm mbo mbr mbu mi- mib mii mik mim mio mir miu mkb mkk mkm mko mkr mku mmb mmi mmk mmm mmo mmr mmu mob moi mok mom moo mor mou mrb mri mrk mrm mro mrr mru mub mui muk mum mur muu o-i ob- obb obi obk obm obo obr obu oib oii oik oim oio oir oiu okb oki okk oko okr oku om- omb omi omm omo omr omu oo- oob ooi ook oom ooo oor or- orb ori ork orm oro orr oru ou- oui ouk oum ouo our rbb rbi rbk rbm rbo rbr rbu rib rii rik rim rio rir rkb rkk rkm rko rku rmb rmi rmm rmo rmr rob roi rok rom roo ror rou rrb rri rrk rrm rrr rru rub rui ruk rum ruo rur ruu ubb ubi ubk ubo ubr ubu uib uii uim uio uir uiu ukb uki ukk ukr uku um- umb umi umm umo umr umu uob uok uom uoo uor ur- urb uri urk urm uro urr uru uum uur uuu