ddd ddf ddg ddo ddp ddr dfd dff dfg dfo dfp dfr dgd dgf dgg dgp dgr dod dof dog doo dop dor dpd dpf dpg dpo dpp dpr drd drg dro drp drr fdd fdf fdg fdo fdp fdr ffd fff ffg ffo ffp ffr fgd fgf fgg fgp fgr fof fog foo fop for fpd fpg fpo fpp fpr frd frf frg fro frp frr g-d g-p gdd gdf gdo gdp gdr gfd gff gfo gfp gfr ggd ggg ggo ggp ggr god gof gog goo gop gor gpd gpf gpg gpo gpp gpr grd grf grg gro grp grr odd odf odg odo odp odr of- ofd off ofg ofo ofp ofr ogd ogf ogg ogo ogp oo- ood oof oog ooo oop oor op- opd opf opg opo opp opr or- ord orf org oro orp orr p-p pdd pdf pdg pdo pdp pdr pfd pff pfg pfo pfp pfr pgd pgf pgg pgo pgp pgr pod pof pog poo pop por ppd ppf ppg ppo ppp ppr prd prf prg pro prp prr rdd rdf rdg rdo rdp rdr rfd rff rfg rfo rfp rfr rgd rgf rgg rgo rgp rgr rod rof rog roo rop ror rpd rpf rpg rpo rpp rpr rrd rrf rrg rrp rrr