-er -ol b-p bbb bbe bbg bbl bbo bbp bbr bbx be- beb bee beg bel beo bep ber bex bgb bge bgg bgl bgo bgp bgr bgx blb ble blg bll blo blp blr blx bob boe bog bol boo bop bor box bpb bpe bpg bpl bpo bpp bpr bpx brb bre brg brl bro brp brr brx bxb bxl bxo bxx ebb ebe ebg ebl ebo ebp ebr ebx eeb eee eeg eel eeo eep eer eex egb ege egg egl ego egp egr egx elb ele elg ell elo elp elr elx eo- eob eoe eog eol eoo eop eor ep- epb epe epg epl epo epp epr epx erb ere erg erl ero erp err ex- exe exl exo exp exr exx g-p gbe gbg gbl gbo gbp gbr gbx ge- geb gee geg gel geo gep ger gex ggb ggg ggo ggp ggr glb gle glg gll glo glp glr glx gob goe gog gol goo gop gor gox gpb gpe gpg gpl gpo gpp gpr gpx grb gre grg grl gro grp grr grx gxl gxp l-p lbb lbe lbg lbl lbo lbp lbr lbx leb lee leg lel leo lep ler lex lgb lge lgg lgl lgo lgp lgr llb lle llg lll llo llp llr lob loe log lol loo lop lor lox lpb lpe lpg lpl lpo lpp lpr lpx lrb lrg lro lrp lrr lxo lxr lxx ob- obb obe obg obl obo obp obr obx oeb oee oeg oel oeo oep oer oex oge ogg ogl ogo ogp ogx olb ole olg oll olo olp oo- oob oog ool ooo oop oor oox op- opb ope opg opl opo opp opr opx or- orb ore org orl oro orp orr orx ox- oxb oxo oxx p-p pbb pbe pbg pbl pbo pbp pbr pbx peb pee peg pel peo pep per pex pgb pge pgg pgl pgo pgp pgr plb ple plg pll plo plp plr plx pob poe pog pol poo pop por pox ppb ppe ppg ppl ppo ppp ppr ppx prb pre prg prl pro prp prr prx pxe pxg pxl pxr rbb rbe rbg rbl rbo rbp rbr rbx re- reb ree reg rel reo rep rer rex rgb rge rgg rgo rgp rgr rgx rle rlg rll rlo rlp rlr rob roe rog rol roo rop ror rox rpb rpe rpg rpl rpo rpp rpr rpx rrb rrg rrl rrp rrr rxp rxr xbe xbl xbr xbx xee xeg xel xep xer xex xge xgl xgp xlb xlg xlr xog xoo xop xor xox xpb xpe xpg xpl xpo xpp xrx xxl xxo xxp xxx