-er b-u bbb bbe bbi bbk bbl bbn bbr bbu be- beb bee bei bek bel ben ber beu bi- bib bie bii bik bil bin bir biu bkb bke bkk bkl bkn bkr blb ble bli blk bll bln blr blu bnb bne bni bnk bnl bnn bnr bnu brb bre bri brk brl brn brr bru bub bue bui buk bul bun bur buu ebb ebe ebi ebk ebl ebn ebr ebu eeb eee eek eel een eer eib eie eii eik eil ein eir eiu ekb eke eki ekl ekr eku elb ele eli elk ell eln elr elu en- enb ene eni enk enl enn enr enu erb ere eri erk erl ern err eru eu- eub eue eui eul eun eur ibb ibe ibi ibk ibl ibn ibr ibu ie- iee iei iek iel ien ier iib iie iii iil iin iir iiu ikb ike iki ikk ikl ikr iku il- ilb ile ili ilk ill iln ilr ilu in- inb ine ini ink inl inn inr inu ir- irb ire iri irk irl irn irr iru iu- iub iue iui iur kbb kbe kbi kbk kbl kbn kbr kbu ke- keb kee kei kek kel ken ker kib kie kii kik kil kin kir kiu kkb kke kki kkk kkl kkn kkr kku kl- klb kli klr klu kn- kne kni knk knl knn knr knu kri krk krl krn krr kru kub kue kui kuk kul kun kur kuu lbb lbe lbi lbk lbl lbr lbu leb lee lei lek lel len ler leu lib lie lii lik lil lin lir liu lkb lkl lkr llb lle lli llk lll lln llr llu lnb lne lni lnk lnl lnn lnr lnu lrb lri lrk lrn lrr lru lub lue lui luk lul lun lur luu n-i nbb nbe nbi nbk nbl nbn nbr nbu ne- neb nee nei nek nel nen ner neu nib nie nii nik nil nin nir niu nke nki nkk nkn nkr nku nlb nle nli nlk nll nln nlr nlu nnb nne nni nnk nnl nnn nnu nrb nre nri nrk nrl nrn nrr nru nub nue nui nuk nul nun nur nuu rbb rbe rbi rbk rbl rbn rbr rbu re- reb ree rei rek rel ren rer reu rib rie rii rik ril rin rir rkb rke rkk rku rle rli rll rln rlr rlu rnb rni rnn rnr rnu rrb rri rrk rrl rrn rrr rru rub rue rui ruk run rur ruu ubb ube ubi ubk ubl ubn ubr ubu ueb uee uei uel uen uer uib uie uii uil uin uir uiu ukb uke uki ukk ukl ukn ukr uku ulb ule uli ulk ull uln ulr ulu un- unb une uni unk unl unn unr unu ur- urb ure uri urk url urn urr uru uue uun uur uuu