b-u bbb bbi bbk bbn bbu bi- bib bii bik bin biu biz bkb bkk bkn bnb bni bnk bnn bnu bnz bub bui buk bun buu buz bzn bzu bzz ibb ibi ibk ibn ibu ibz iib iii iin iiu ikb iki ikk iku in- inb ini ink inn inu iu- iub iui iuz izi izu izz k-z kbb kbi kbk kbn kbu kbz kib kii kik kin kiu kiz kkb kki kkk kkn kku kn- kni knk knn knu kub kui kuk kun kuu n-i nbb nbi nbk nbn nbu nib nii nik nin niu niz nki nkk nkn nku nnb nni nnk nnn nnu nnz nub nui nuk nun nuu nzb nzi nzz ubb ubi ubk ubn ubu uib uii uin uiu ukb uki ukk ukn uku ukz un- unb uni unk unn unu uun uuu uzb uzi uzu zbb zib zik zin ziz znn zub zui zuk zun zuz zzz