-er -ol bbb bbe bbi bbk bbl bbm bbo bbr be- beb bee bei bek bel bem beo ber bi- bib bie bii bik bil bim bio bir bkb bke bkk bkl bkm bko bkr blb ble bli blk bll blm blo blr bmb bme bmi bmk bml bmm bmo bmr bob boe boi bok bol bom boo bor brb bre bri brk brl brm bro brr ebb ebe ebi ebk ebl ebm ebo ebr eeb eee eek eel eem eeo eer eib eie eii eik eil eim eio eir ekb eke eki ekl eko ekr elb ele eli elk ell elm elo elr em- emb eme emi emk eml emm emo emr eo- eob eoe eoi eok eol eom eoo eor erb ere eri erk erl erm ero err ibb ibe ibi ibk ibl ibm ibo ibr ie- iee iei iek iel iem ier iib iie iii iil iim iio iir ikb ike iki ikk ikl iko ikr il- ilb ile ili ilk ill ilm ilo ilr im- imb ime imi iml imm imo io- iob ioe ioi iol iom ioo ior ir- irb ire iri irk irl irm iro irr kbb kbe kbi kbk kbl kbm kbo kbr ke- keb kee kei kek kel kem keo ker kib kie kii kik kil kim kio kir kkb kke kki kkk kkl kkm kkr kl- klb kli klm klo klr kmb kme kmi kmk kml kmm kmo kob koe koi kok kol kom koo kor kri krk krl kro krr lbb lbe lbi lbk lbl lbm lbo lbr leb lee lei lek lel lem leo ler lib lie lii lik lil lim lio lir lkb lkl lkr llb lle lli llk lll llm llo llr lmb lme lmi lmk lml lmm lmo lmr lob loe loi lok lol lom loo lor lrb lri lrk lrm lro lrr m-o m-r mbb mbe mbi mbk mbl mbm mbo mbr meb mee mei mek mel mem meo mer mi- mib mie mii mik mil mim mio mir mkb mke mkk mkl mkm mko mkr mlb mle mli mlk mll mlm mlo mlr mmb mme mmi mmk mml mmm mmo mmr mob moe moi mok mol mom moo mor mrb mre mri mrk mrl mrm mro mrr o-i ob- obb obe obi obk obl obm obo obr oeb oee oei oel oem oeo oer oib oie oii oik oil oim oio oir okb oke oki okk okl oko okr olb ole oli olk oll olm olo om- omb ome omi oml omm omo omr oo- oob ooi ook ool oom ooo oor or- orb ore ori ork orl orm oro orr rbb rbe rbi rbk rbl rbm rbo rbr re- reb ree rei rek rel rem reo rer rib rie rii rik ril rim rio rir rkb rke rkk rkm rko rle rli rll rlm rlo rlr rmb rme rmi rml rmm rmo rmr rob roe roi rok rol rom roo ror rrb rri rrk rrl rrm rrr