-er -ol bbb bbe bbl bbm bbo bbr be- beb bee bel bem beo ber blb ble bll blm blo blr bmb bme bml bmm bmo bmr bob boe bol bom boo bor brb bre brl brm bro brr ebb ebe ebl ebm ebo ebr eeb eee eel eem eeo eer elb ele ell elm elo elr em- emb eme eml emm emo emr eo- eob eoe eol eom eoo eor erb ere erl erm ero err lbb lbe lbl lbm lbo lbr leb lee lel lem leo ler llb lle lll llm llo llr lmb lme lml lmm lmo lmr lob loe lol lom loo lor lrb lrm lro lrr m-o m-r mbb mbe mbl mbm mbo mbr meb mee mel mem meo mer mlb mle mll mlm mlo mlr mmb mme mml mmm mmo mmr mob moe mol mom moo mor mrb mre mrl mrm mro mrr ob- obb obe obl obm obo obr oeb oee oel oem oeo oer olb ole oll olm olo om- omb ome oml omm omo omr oo- oob ool oom ooo oor or- orb ore orl orm oro orr rbb rbe rbl rbm rbo rbr re- reb ree rel rem reo rer rle rll rlm rlo rlr rmb rme rml rmm rmo rmr rob roe rol rom roo ror rrb rrl rrm rrr