-er -ol b-p bbb bbe bbl bbm bbn bbo bbp bbr be- beb bee bel bem ben beo bep ber blb ble bll blm bln blo blp blr bmb bme bml bmm bmn bmo bmp bmr bnb bne bnl bnn bno bnp bnr bob boe bol bom bon boo bop bor bpb bpe bpl bpm bpn bpo bpp bpr brb bre brl brm brn bro brp brr ebb ebe ebl ebm ebn ebo ebp ebr eeb eee eel eem een eeo eep eer elb ele ell elm eln elo elp elr em- emb eme eml emm emn emo emp emr en- enb ene enl enm enn eno enp enr eo- eob eoe eol eom eon eoo eop eor ep- epb epe epl epm epn epo epp epr erb ere erl erm ern ero erp err l-p lbb lbe lbl lbm lbo lbp lbr leb lee lel lem len leo lep ler llb lle lll llm lln llo llp llr lmb lme lml lmm lmn lmo lmp lmr lnb lne lnl lnm lnn lno lnp lnr lob loe lol lom lon loo lop lor lpb lpe lpl lpm lpn lpo lpp lpr lrb lrm lrn lro lrp lrr m-o m-r mbb mbe mbl mbm mbo mbp mbr meb mee mel mem men meo mep mer mlb mle mll mlm mln mlo mlp mlr mmb mme mml mmm mmn mmo mmp mmr mnb mne mnl mnm mnn mno mnp mnr mob moe mol mom mon moo mop mor mpb mpe mpl mpm mpn mpo mpp mpr mrb mre mrl mrm mrn mro mrp mrr nbb nbe nbl nbm nbn nbo nbp nbr ne- neb nee nel nem nen neo nep ner nlb nle nll nlm nln nlo nlp nlr nmb nme nml nmm nmn nmo nmp nmr nnb nne nnl nnm nnn nno nnp no- nob noe nol nom non noo nop nor npb npe npl npm npn npo npp npr nrb nre nrl nrm nrn nro nrp nrr ob- obb obe obl obm obn obo obp obr oeb oee oel oem oen oeo oep oer olb ole oll olm oln olo olp om- omb ome oml omm omn omo omp omr on- onb one onl onn ono onp onr oo- oob ool oom oon ooo oop oor op- opb ope opl opm opn opo opp opr or- orb ore orl orm orn oro orp orr p-p pbb pbe pbl pbm pbn pbo pbp pbr peb pee pel pem pen peo pep per plb ple pll plm pln plo plp plr pmb pme pml pmm pmn pmo pmp pmr pn- pnb pne pnl pnm pnn pno pnp pnr pob poe pol pom pon poo pop por ppb ppe ppl ppm ppn ppo ppp ppr prb pre prl prm prn pro prp prr rbb rbe rbl rbm rbn rbo rbp rbr re- reb ree rel rem ren reo rep rer rle rll rlm rln rlo rlp rlr rmb rme rml rmm rmn rmo rmp rmr rnb rnm rnn rno rnp rnr rob roe rol rom ron roo rop ror rpb rpe rpl rpm rpn rpo rpp rpr rrb rrl rrm rrn rrp rrr