-er -ol bbb bbe bbi bbk bbl bbm bbo bbr bbs be- beb bee bei bek bel bem beo ber bes bi- bib bie bii bik bil bim bio bir bis bkb bke bkk bkl bkm bko bkr bks blb ble bli blk bll blm blo blr bls bmb bme bmi bmk bml bmm bmo bmr bms bob boe boi bok bol bom boo bor bos brb bre bri brk brl brm bro brr brs bsb bse bsi bsk bsl bsm bso bsr bss ebb ebe ebi ebk ebl ebm ebo ebr ebs eeb eee eek eel eem eeo eer ees eib eie eii eik eil eim eio eir eis ekb eke eki ekl eko ekr eks elb ele eli elk ell elm elo elr els em- emb eme emi emk eml emm emo emr ems eo- eob eoe eoi eok eol eom eoo eor eos erb ere eri erk erl erm ero err ers es- esb ese esi esk esl esm eso esr ess ibb ibe ibi ibk ibl ibm ibo ibr ibs ie- iee iei iek iel iem ier ies iib iie iii iil iim iio iir iis ikb ike iki ikk ikl iko ikr iks il- ilb ile ili ilk ill ilm ilo ilr ils im- imb ime imi iml imm imo ims io- iob ioe ioi iol iom ioo ior ios ir- irb ire iri irk irl irm iro irr irs is- isb ise isi isk isl ism iso isr iss kbb kbe kbi kbk kbl kbm kbo kbr kbs ke- keb kee kei kek kel kem keo ker kes kib kie kii kik kil kim kio kir kis kkb kke kki kkk kkl kkm kkr kks kl- klb kli klm klo klr kls kmb kme kmi kmk kml kmm kmo kms kob koe koi kok kol kom koo kor kos kri krk krl kro krr krs ksb kse ksi ksk ksl ksm kso ksr kss lbb lbe lbi lbk lbl lbm lbo lbr lbs leb lee lei lek lel lem leo ler les lib lie lii lik lil lim lio lir lis lkb lkl lkr lks llb lle lli llk lll llm llo llr lls lmb lme lmi lmk lml lmm lmo lmr lms lob loe loi lok lol lom loo lor los lrb lri lrk lrm lro lrr lrs lsb lse lsi lsk lsl lsm lso lsr lss m-o m-r mbb mbe mbi mbk mbl mbm mbo mbr mbs meb mee mei mek mel mem meo mer mes mi- mib mie mii mik mil mim mio mir mis mkb mke mkk mkl mkm mko mkr mks mlb mle mli mlk mll mlm mlo mlr mls mmb mme mmi mmk mml mmm mmo mmr mms mob moe moi mok mol mom moo mor mos mrb mre mri mrk mrl mrm mro mrr mrs msb mse msi msk msl msm mso msr mss o-i ob- obb obe obi obk obl obm obo obr obs oeb oee oei oel oem oeo oer oes oib oie oii oik oil oim oio oir ois okb oke oki okk okl oko okr oks olb ole oli olk oll olm olo ols om- omb ome omi oml omm omo omr oms oo- oob ooi ook ool oom ooo oor oos or- orb ore ori ork orl orm oro orr ors os- osb ose osi osk osl osm oso osr oss rbb rbe rbi rbk rbl rbm rbo rbr rbs re- reb ree rei rek rel rem reo rer res rib rie rii rik ril rim rio rir ris rkb rke rkk rkm rko rks rle rli rll rlm rlo rlr rls rmb rme rmi rml rmm rmo rmr rms rob roe roi rok rol rom roo ror ros rrb rri rrk rrl rrm rrr rrs rsb rse rsi rsk rsl rsm rso rsr rss sbb sbe sbi sbk sbl sbm sbo sbr sbs se- seb see sei sek sel sem seo ser ses sib sie sii sik sil sim sio sir sis sk- skb ske ski skk skl skm sko skr sks slb sle sli slk sll slm slo slr sls smb sme smi smk sml smm smo smr sms sob soe soi sok sol som soo sor sos sr- srb sre sri srk srl srm sro srr srs ss- ssb sse ssi ssk ssl ssm sso ssr sss