-er ddd dde ddf ddg ddo ddp ddr de- ded dee def deg deo dep der dfd dfe dff dfg dfo dfp dfr dgd dge dgf dgg dgp dgr dod doe dof dog doo dop dor dpd dpe dpf dpg dpo dpp dpr drd dre drg dro drp drr ed- edd ede edf edg edo edp edr eed eee eef eeg eeo eep eer ef- efd efe eff efg efo efp efr egd ege egf egg ego egp egr eo- eod eoe eof eog eoo eop eor ep- epd epe epf epg epo epp epr erd ere erf erg ero erp err fdd fde fdf fdg fdo fdp fdr fed fee fef feg feo fep fer ffd ffe fff ffg ffo ffp ffr fgd fge fgf fgg fgp fgr foe fof fog foo fop for fpd fpe fpg fpo fpp fpr frd fre frf frg fro frp frr g-d g-p gdd gde gdf gdo gdp gdr ge- ged gee gef geg geo gep ger gfd gfe gff gfo gfp gfr ggd ggg ggo ggp ggr god goe gof gog goo gop gor gpd gpe gpf gpg gpo gpp gpr grd gre grf grg gro grp grr odd ode odf odg odo odp odr oed oee oef oeg oeo oep oer of- ofd ofe off ofg ofo ofp ofr ogd oge ogf ogg ogo ogp oo- ood oof oog ooo oop oor op- opd ope opf opg opo opp opr or- ord ore orf org oro orp orr p-p pdd pde pdf pdg pdo pdp pdr ped pee pef peg peo pep per pfd pfe pff pfg pfo pfp pfr pgd pge pgf pgg pgo pgp pgr pod poe pof pog poo pop por ppd ppe ppf ppg ppo ppp ppr prd pre prf prg pro prp prr rdd rde rdf rdg rdo rdp rdr re- red ree ref reg reo rep rer rfd rfe rff rfg rfo rfp rfr rgd rge rgf rgg rgo rgp rgr rod roe rof rog roo rop ror rpd rpe rpf rpg rpo rpp rpr rrd rrf rrg rrp rrr