b-u bbb bbi bbk bbl bbn bbr bbu bi- bib bii bik bil bin bir biu bkb bkk bkl bkn bkr blb bli blk bll bln blr blu bnb bni bnk bnl bnn bnr bnu brb bri brk brl brn brr bru bub bui buk bul bun bur buu ibb ibi ibk ibl ibn ibr ibu iib iii iil iin iir iiu ikb iki ikk ikl ikr iku il- ilb ili ilk ill iln ilr ilu in- inb ini ink inl inn inr inu ir- irb iri irk irl irn irr iru iu- iub iui iur kbb kbi kbk kbl kbn kbr kbu kib kii kik kil kin kir kiu kkb kki kkk kkl kkn kkr kku kl- klb kli klr klu kn- kni knk knl knn knr knu kri krk krl krn krr kru kub kui kuk kul kun kur kuu lbb lbi lbk lbl lbr lbu lib lii lik lil lin lir liu lkb lkl lkr llb lli llk lll lln llr llu lnb lni lnk lnl lnn lnr lnu lrb lri lrk lrn lrr lru lub lui luk lul lun lur luu n-i nbb nbi nbk nbl nbn nbr nbu nib nii nik nil nin nir niu nki nkk nkn nkr nku nlb nli nlk nll nln nlr nlu nnb nni nnk nnl nnn nnu nrb nri nrk nrl nrn nrr nru nub nui nuk nul nun nur nuu rbb rbi rbk rbl rbn rbr rbu rib rii rik ril rin rir rkb rkk rku rli rll rln rlr rlu rnb rni rnn rnr rnu rrb rri rrk rrl rrn rrr rru rub rui ruk run rur ruu ubb ubi ubk ubl ubn ubr ubu uib uii uil uin uir uiu ukb uki ukk ukl ukn ukr uku ulb uli ulk ull uln ulr ulu un- unb uni unk unl unn unr unu ur- urb uri urk url urn urr uru uun uur uuu