-er -ol ddd dde ddf ddl ddo ddp ddr ddx de- ded dee def del deo dep der dex dfd dfe dff dfl dfo dfp dfr dfx dl- dld dle dlf dll dlo dlp dlr dlx dod doe dof dol doo dop dor dox dpd dpe dpf dpl dpo dpp dpr drd dre drl dro drp drr drx dxd dxl dxo dxp dxr dxx ed- edd ede edf edl edo edp edr edx eed eee eef eel eeo eep eer eex ef- efd efe eff efl efo efp efr efx eld ele elf ell elo elp elr elx eo- eod eoe eof eol eoo eop eor ep- epd epe epf epl epo epp epr epx erd ere erf erl ero erp err ex- exd exe exl exo exp exr exx fdd fde fdf fdl fdo fdp fdr fdx fed fee fef fel feo fep fer fex ffd ffe fff ffl ffo ffp ffr ffx fld fle flf fll flo flp flr flx foe fof fol foo fop for fox fpd fpe fpl fpo fpp fpr fpx frd fre frf frl fro frp frr fxe fxp fxr fxx l-p ldd lde ldf ldl ldo ldp ldr led lee lef lel leo lep ler lex lfd lfe lff lfl lfo lfp lfr lfx lld lle llf lll llo llp llr lod loe lof lol loo lop lor lox lpd lpe lpf lpl lpo lpp lpr lpx lrd lrf lro lrp lrr lxd lxo lxr lxx odd ode odf odl odo odp odr oed oee oef oel oeo oep oer oex of- ofd ofe off ofl ofo ofp ofr ofx old ole olf oll olo olp oo- ood oof ool ooo oop oor oox op- opd ope opf opl opo opp opr opx or- ord ore orf orl oro orp orr orx ox- oxf oxo oxx p-p pdd pde pdf pdl pdo pdp pdr pdx ped pee pef pel peo pep per pex pfd pfe pff pfl pfo pfp pfr pfx pld ple plf pll plo plp plr plx pod poe pof pol poo pop por pox ppd ppe ppf ppl ppo ppp ppr ppx prd pre prf prl pro prp prr prx pxe pxl pxr rdd rde rdf rdl rdo rdp rdr rdx re- red ree ref rel reo rep rer rex rfd rfe rff rfl rfo rfp rfr rld rle rlf rll rlo rlp rlr rod roe rof rol roo rop ror rox rpd rpe rpf rpl rpo rpp rpr rpx rrd rrf rrl rrp rrr rxp rxr xde xdf xdr xed xee xel xep xer xex xfe xfl xfx xld xlf xlr xod xof xoo xop xor xox xpd xpe xpf xpl xpo xpp xrd xrf xrx xxl xxo xxp xxx