-er -ol b-p bbb bbe bbl bbm bbo bbp bbr bbs be- beb bee bel bem beo bep ber bes blb ble bll blm blo blp blr bls bmb bme bml bmm bmo bmp bmr bms bob boe bol bom boo bop bor bos bpb bpe bpl bpm bpo bpp bpr bps brb bre brl brm bro brp brr brs bsb bse bsl bsm bso bsp bsr bss ebb ebe ebl ebm ebo ebp ebr ebs eeb eee eel eem eeo eep eer ees elb ele ell elm elo elp elr els em- emb eme eml emm emo emp emr ems eo- eob eoe eol eom eoo eop eor eos ep- epb epe epl epm epo epp epr eps erb ere erl erm ero erp err ers es- esb ese esl esm eso esp esr ess l-p lbb lbe lbl lbm lbo lbp lbr lbs leb lee lel lem leo lep ler les llb lle lll llm llo llp llr lls lmb lme lml lmm lmo lmp lmr lms lob loe lol lom loo lop lor los lpb lpe lpl lpm lpo lpp lpr lps lrb lrm lro lrp lrr lrs lsb lse lsl lsm lso lsp lsr lss m-o m-r mbb mbe mbl mbm mbo mbp mbr mbs meb mee mel mem meo mep mer mes mlb mle mll mlm mlo mlp mlr mls mmb mme mml mmm mmo mmp mmr mms mob moe mol mom moo mop mor mos mpb mpe mpl mpm mpo mpp mpr mps mrb mre mrl mrm mro mrp mrr mrs msb mse msl msm mso msp msr mss ob- obb obe obl obm obo obp obr obs oeb oee oel oem oeo oep oer oes olb ole oll olm olo olp ols om- omb ome oml omm omo omp omr oms oo- oob ool oom ooo oop oor oos op- opb ope opl opm opo opp opr ops or- orb ore orl orm oro orp orr ors os- osb ose osl osm oso osp osr oss p-p pbb pbe pbl pbm pbo pbp pbr pbs peb pee pel pem peo pep per pes plb ple pll plm plo plp plr pls pmb pme pml pmm pmo pmp pmr pms pob poe pol pom poo pop por pos ppb ppe ppl ppm ppo ppp ppr pps prb pre prl prm pro prp prr prs ps- psb pse psl psm pso psp psr pss rbb rbe rbl rbm rbo rbp rbr rbs re- reb ree rel rem reo rep rer res rle rll rlm rlo rlp rlr rls rmb rme rml rmm rmo rmp rmr rms rob roe rol rom roo rop ror ros rpb rpe rpl rpm rpo rpp rpr rps rrb rrl rrm rrp rrr rrs rsb rse rsl rsm rso rsp rsr rss sbb sbe sbl sbm sbo sbp sbr sbs se- seb see sel sem seo sep ser ses slb sle sll slm slo slp slr sls smb sme sml smm smo smp smr sms sob soe sol som soo sop sor sos spb spe spl spm spo spp spr sps sr- srb sre srl srm sro srp srr srs ss- ssb sse ssl ssm sso ssp ssr sss