-er -ol b-p bbb bbe bbl bbm bbo bbp bbr be- beb bee bel bem beo bep ber blb ble bll blm blo blp blr bmb bme bml bmm bmo bmp bmr bob boe bol bom boo bop bor bpb bpe bpl bpm bpo bpp bpr brb bre brl brm bro brp brr ebb ebe ebl ebm ebo ebp ebr eeb eee eel eem eeo eep eer elb ele ell elm elo elp elr em- emb eme eml emm emo emp emr eo- eob eoe eol eom eoo eop eor ep- epb epe epl epm epo epp epr erb ere erl erm ero erp err l-p lbb lbe lbl lbm lbo lbp lbr leb lee lel lem leo lep ler llb lle lll llm llo llp llr lmb lme lml lmm lmo lmp lmr lob loe lol lom loo lop lor lpb lpe lpl lpm lpo lpp lpr lrb lrm lro lrp lrr m-o m-r mbb mbe mbl mbm mbo mbp mbr meb mee mel mem meo mep mer mlb mle mll mlm mlo mlp mlr mmb mme mml mmm mmo mmp mmr mob moe mol mom moo mop mor mpb mpe mpl mpm mpo mpp mpr mrb mre mrl mrm mro mrp mrr ob- obb obe obl obm obo obp obr oeb oee oel oem oeo oep oer olb ole oll olm olo olp om- omb ome oml omm omo omp omr oo- oob ool oom ooo oop oor op- opb ope opl opm opo opp opr or- orb ore orl orm oro orp orr p-p pbb pbe pbl pbm pbo pbp pbr peb pee pel pem peo pep per plb ple pll plm plo plp plr pmb pme pml pmm pmo pmp pmr pob poe pol pom poo pop por ppb ppe ppl ppm ppo ppp ppr prb pre prl prm pro prp prr rbb rbe rbl rbm rbo rbp rbr re- reb ree rel rem reo rep rer rle rll rlm rlo rlp rlr rmb rme rml rmm rmo rmp rmr rob roe rol rom roo rop ror rpb rpe rpl rpm rpo rpp rpr rrb rrl rrm rrp rrr