b-u bbb bbi bbk bbn bbo bbu bi- bib bii bik bin bio biu bkb bkk bkn bko bnb bni bnk bnn bno bnu bob boi bok bon boo bou bub bui buk bun buo buu ibb ibi ibk ibn ibo ibu iib iii iin iio iiu ikb iki ikk iko iku in- inb ini ink inn ino inu io- iob ioi ion ioo iou iu- iub iui kbb kbi kbk kbn kbo kbu kib kii kik kin kio kiu kkb kki kkk kkn kku kn- kni knk knn kno knu kob koi kok kon koo kou kub kui kuk kun kuu n-i nbb nbi nbk nbn nbo nbu nib nii nik nin nio niu nki nkk nkn nko nku nnb nni nnk nnn nno nnu no- nob noi nok non noo nou nub nui nuk nun nuo nuu o-i ob- obb obi obk obn obo obu oib oii oik oin oio oiu okb oki okk oko oku on- onb oni onk onn ono onu oo- oob ooi ook oon ooo ou- oui ouk oun ouo ubb ubi ubk ubn ubo ubu uib uii uin uio uiu ukb uki ukk ukn uku un- unb uni unk unn uno unu uob uok uon uoo uun uuu