-er -ol b-p bbb bbe bbl bbo bbp bbr bbs be- beb bee bel beo bep ber bes blb ble bll blo blp blr bls bob boe bol boo bop bor bos bpb bpe bpl bpo bpp bpr bps brb bre brl bro brp brr brs bsb bse bsl bso bsp bsr bss ebb ebe ebl ebo ebp ebr ebs eeb eee eel eeo eep eer ees elb ele ell elo elp elr els eo- eob eoe eol eoo eop eor eos ep- epb epe epl epo epp epr eps erb ere erl ero erp err ers es- esb ese esl eso esp esr ess l-p lbb lbe lbl lbo lbp lbr lbs leb lee lel leo lep ler les llb lle lll llo llp llr lls lob loe lol loo lop lor los lpb lpe lpl lpo lpp lpr lps lrb lro lrp lrr lrs lsb lse lsl lso lsp lsr lss ob- obb obe obl obo obp obr obs oeb oee oel oeo oep oer oes olb ole oll olo olp ols oo- oob ool ooo oop oor oos op- opb ope opl opo opp opr ops or- orb ore orl oro orp orr ors os- osb ose osl oso osp osr oss p-p pbb pbe pbl pbo pbp pbr pbs peb pee pel peo pep per pes plb ple pll plo plp plr pls pob poe pol poo pop por pos ppb ppe ppl ppo ppp ppr pps prb pre prl pro prp prr prs ps- psb pse psl pso psp psr pss rbb rbe rbl rbo rbp rbr rbs re- reb ree rel reo rep rer res rle rll rlo rlp rlr rls rob roe rol roo rop ror ros rpb rpe rpl rpo rpp rpr rps rrb rrl rrp rrr rrs rsb rse rsl rso rsp rsr rss sbb sbe sbl sbo sbp sbr sbs se- seb see sel seo sep ser ses slb sle sll slo slp slr sls sob soe sol soo sop sor sos spb spe spl spo spp spr sps sr- srb sre srl sro srp srr srs ss- ssb sse ssl sso ssp ssr sss