-er b-u bbb bbe bbi bbk bbl bbm bbr bbu be- beb bee bei bek bel bem ber beu bi- bib bie bii bik bil bim bir biu bkb bke bkk bkl bkm bkr blb ble bli blk bll blm blr blu bmb bme bmi bmk bml bmm bmr bmu brb bre bri brk brl brm brr bru bub bue bui buk bul bum bur buu ebb ebe ebi ebk ebl ebm ebr ebu eeb eee eek eel eem eer eib eie eii eik eil eim eir eiu ekb eke eki ekl ekr eku elb ele eli elk ell elm elr elu em- emb eme emi emk eml emm emr emu erb ere eri erk erl erm err eru eu- eub eue eui eul eur ibb ibe ibi ibk ibl ibm ibr ibu ie- iee iei iek iel iem ier iib iie iii iil iim iir iiu ikb ike iki ikk ikl ikr iku il- ilb ile ili ilk ill ilm ilr ilu im- imb ime imi iml imm imu ir- irb ire iri irk irl irm irr iru iu- iub iue iui ium iur kbb kbe kbi kbk kbl kbm kbr kbu ke- keb kee kei kek kel kem ker kib kie kii kik kil kim kir kiu kkb kke kki kkk kkl kkm kkr kku kl- klb kli klm klr klu kmb kme kmi kmk kml kmm kmu kri krk krl krr kru kub kue kui kuk kul kum kur kuu lbb lbe lbi lbk lbl lbm lbr lbu leb lee lei lek lel lem ler leu lib lie lii lik lil lim lir liu lkb lkl lkr llb lle lli llk lll llm llr llu lmb lme lmi lmk lml lmm lmr lmu lrb lri lrk lrm lrr lru lub lue lui luk lul lum lur luu m-r mbb mbe mbi mbk mbl mbm mbr mbu meb mee mei mek mel mem mer meu mi- mib mie mii mik mil mim mir miu mkb mke mkk mkl mkm mkr mku mlb mle mli mlk mll mlm mlr mlu mmb mme mmi mmk mml mmm mmr mmu mrb mre mri mrk mrl mrm mrr mru mub mue mui muk mul mum mur muu rbb rbe rbi rbk rbl rbm rbr rbu re- reb ree rei rek rel rem rer reu rib rie rii rik ril rim rir rkb rke rkk rkm rku rle rli rll rlm rlr rlu rmb rme rmi rml rmm rmr rrb rri rrk rrl rrm rrr rru rub rue rui ruk rum rur ruu ubb ube ubi ubk ubl ubr ubu ueb uee uei uel uem uer uib uie uii uil uim uir uiu ukb uke uki ukk ukl ukr uku ulb ule uli ulk ull ulm ulr ulu um- umb ume umi uml umm umr umu ur- urb ure uri urk url urm urr uru uue uum uur uuu