bbb bbi bbk bbn bbr bi- bib bii bik bin bir bkb bkk bkn bkr bnb bni bnk bnn bnr brb bri brk brn brr ibb ibi ibk ibn ibr iib iii iin iir ikb iki ikk ikr in- inb ini ink inn inr ir- irb iri irk irn irr kbb kbi kbk kbn kbr kib kii kik kin kir kkb kki kkk kkn kkr kn- kni knk knn knr kri krk krn krr n-i nbb nbi nbk nbn nbr nib nii nik nin nir nki nkk nkn nkr nnb nni nnk nnn nrb nri nrk nrn nrr rbb rbi rbk rbn rbr rib rii rik rin rir rkb rkk rnb rni rnn rnr rrb rri rrk rrn rrr