ddd ddg ddo ddp ddr dgd dgg dgp dgr dod dog doo dop dor dpd dpg dpo dpp dpr drd drg dro drp drr g-d g-p gdd gdo gdp gdr ggd ggg ggo ggp ggr god gog goo gop gor gpd gpg gpo gpp gpr grd grg gro grp grr odd odg odo odp odr ogd ogg ogo ogp oo- ood oog ooo oop oor op- opd opg opo opp opr or- ord org oro orp orr p-p pdd pdg pdo pdp pdr pgd pgg pgo pgp pgr pod pog poo pop por ppd ppg ppo ppp ppr prd prg pro prp prr rdd rdg rdo rdp rdr rgd rgg rgo rgp rgr rod rog roo rop ror rpd rpg rpo rpp rpr rrd rrg rrp rrr