-er -ol b-p bbb bbe bbg bbl bbo bbp bbr bbs be- beb bee beg bel beo bep ber bes bgb bge bgg bgl bgo bgp bgr bgs blb ble blg bll blo blp blr bls bob boe bog bol boo bop bor bos bpb bpe bpg bpl bpo bpp bpr bps brb bre brg brl bro brp brr brs bsb bse bsg bsl bso bsp bsr bss ebb ebe ebg ebl ebo ebp ebr ebs eeb eee eeg eel eeo eep eer ees egb ege egg egl ego egp egr egs elb ele elg ell elo elp elr els eo- eob eoe eog eol eoo eop eor eos ep- epb epe epg epl epo epp epr eps erb ere erg erl ero erp err ers es- esb ese esg esl eso esp esr ess g-p gbe gbg gbl gbo gbp gbr gbs ge- geb gee geg gel geo gep ger ges ggb ggg ggo ggp ggr ggs glb gle glg gll glo glp glr gls gob goe gog gol goo gop gor gos gpb gpe gpg gpl gpo gpp gpr gps grb gre grg grl gro grp grr grs gsb gse gsg gsl gso gsp gsr gss l-p lbb lbe lbg lbl lbo lbp lbr lbs leb lee leg lel leo lep ler les lgb lge lgg lgl lgo lgp lgr lgs llb lle llg lll llo llp llr lls lob loe log lol loo lop lor los lpb lpe lpg lpl lpo lpp lpr lps lrb lrg lro lrp lrr lrs lsb lse lsg lsl lso lsp lsr lss ob- obb obe obg obl obo obp obr obs oeb oee oeg oel oeo oep oer oes oge ogg ogl ogo ogp ogs olb ole olg oll olo olp ols oo- oob oog ool ooo oop oor oos op- opb ope opg opl opo opp opr ops or- orb ore org orl oro orp orr ors os- osb ose osg osl oso osp osr oss p-p pbb pbe pbg pbl pbo pbp pbr pbs peb pee peg pel peo pep per pes pgb pge pgg pgl pgo pgp pgr pgs plb ple plg pll plo plp plr pls pob poe pog pol poo pop por pos ppb ppe ppg ppl ppo ppp ppr pps prb pre prg prl pro prp prr prs ps- psb pse psg psl pso psp psr pss rbb rbe rbg rbl rbo rbp rbr rbs re- reb ree reg rel reo rep rer res rgb rge rgg rgo rgp rgr rgs rle rlg rll rlo rlp rlr rls rob roe rog rol roo rop ror ros rpb rpe rpg rpl rpo rpp rpr rps rrb rrg rrl rrp rrr rrs rsb rse rsg rsl rso rsp rsr rss sbb sbe sbg sbl sbo sbp sbr sbs se- seb see seg sel seo sep ser ses sgb sge sgg sgl sgo sgp sgr sgs slb sle slg sll slo slp slr sls sob soe sog sol soo sop sor sos spb spe spg spl spo spp spr sps sr- srb sre srg srl sro srp srr srs ss- ssb sse ssg ssl sso ssp ssr sss