-er -ol -up eee eef eel eeo eep eer eex ef- efe eff efl efo efp efr efx ele elf ell elo elp elr elu elx eo- eoe eof eol eoo eop eor eou ep- epe epf epl epo epp epr epu epx ere erf erl ero erp err eru eu- eue euf eul eup eur eux ex- exe exl exo exp exr exu exx fee fef fel feo fep fer feu fex ffe fff ffl ffo ffp ffr ffu ffx fle flf fll flo flp flr flu flx foe fof fol foo fop for fou fox fpe fpl fpo fpp fpr fpu fpx fre frf frl fro frp frr fru fue fuf ful fuo fup fur fuu fux fxe fxp fxr fxu fxx l-p lee lef lel leo lep ler leu lex lfe lff lfl lfo lfp lfr lfu lfx lle llf lll llo llp llr llu loe lof lol loo lop lor lou lox lpe lpf lpl lpo lpp lpr lpu lpx lrf lro lrp lrr lru lue luf lul luo lup lur luu lux lxo lxr lxx oee oef oel oeo oep oer oex of- ofe off ofl ofo ofp ofr ofu ofx ole olf oll olo olp olu oo- oof ool ooo oop oor oox op- ope opf opl opo opp opr opx or- ore orf orl oro orp orr oru orx ou- oue ouf oul ouo oup our ox- oxf oxo oxx p-p pee pef pel peo pep per peu pex pfe pff pfl pfo pfp pfr pfu pfx ple plf pll plo plp plr plu plx poe pof pol poo pop por pou pox ppe ppf ppl ppo ppp ppr ppu ppx pre prf prl pro prp prr pru prx pue puf pul pup pur puu pxe pxl pxr re- ree ref rel reo rep rer reu rex rfe rff rfl rfo rfp rfr rfu rle rlf rll rlo rlp rlr rlu roe rof rol roo rop ror rou rox rpe rpf rpl rpo rpp rpr rpu rpx rrf rrl rrp rrr rru rue ruf ruo rup rur ruu rux rxp rxr uee uef uel uep uer ufe uff ufl ufo ufp ufr ufu ufx ule ulf ull ulo ulp ulr ulu uoe uol uoo uop uor uox up- upe upf upo upp upr upu upx ur- ure urf url uro urp urr uru urx uue uur uuu uxf uxo uxr uxu xee xel xep xer xeu xex xfe xfl xfx xlf xlr xof xoo xop xor xox xpe xpf xpl xpo xpp xrf xrx xue xul xup xxl xxo xxp xxx