-er -ol bbb bbe bbl bbm bbo bbr bbs be- beb bee bel bem beo ber bes blb ble bll blm blo blr bls bmb bme bml bmm bmo bmr bms bob boe bol bom boo bor bos brb bre brl brm bro brr brs bsb bse bsl bsm bso bsr bss ebb ebe ebl ebm ebo ebr ebs eeb eee eel eem eeo eer ees elb ele ell elm elo elr els em- emb eme eml emm emo emr ems eo- eob eoe eol eom eoo eor eos erb ere erl erm ero err ers es- esb ese esl esm eso esr ess lbb lbe lbl lbm lbo lbr lbs leb lee lel lem leo ler les llb lle lll llm llo llr lls lmb lme lml lmm lmo lmr lms lob loe lol lom loo lor los lrb lrm lro lrr lrs lsb lse lsl lsm lso lsr lss m-o m-r mbb mbe mbl mbm mbo mbr mbs meb mee mel mem meo mer mes mlb mle mll mlm mlo mlr mls mmb mme mml mmm mmo mmr mms mob moe mol mom moo mor mos mrb mre mrl mrm mro mrr mrs msb mse msl msm mso msr mss ob- obb obe obl obm obo obr obs oeb oee oel oem oeo oer oes olb ole oll olm olo ols om- omb ome oml omm omo omr oms oo- oob ool oom ooo oor oos or- orb ore orl orm oro orr ors os- osb ose osl osm oso osr oss rbb rbe rbl rbm rbo rbr rbs re- reb ree rel rem reo rer res rle rll rlm rlo rlr rls rmb rme rml rmm rmo rmr rms rob roe rol rom roo ror ros rrb rrl rrm rrr rrs rsb rse rsl rsm rso rsr rss sbb sbe sbl sbm sbo sbr sbs se- seb see sel sem seo ser ses slb sle sll slm slo slr sls smb sme sml smm smo smr sms sob soe sol som soo sor sos sr- srb sre srl srm sro srr srs ss- ssb sse ssl ssm sso ssr sss