ddd ddf ddg ddk ddo ddp dfd dff dfg dfk dfo dfp dgd dgf dgg dgk dgp dkg dkk dko dkp dod dof dog dok doo dop dpd dpf dpg dpk dpo dpp fdd fdf fdg fdk fdo fdp ffd fff ffg ffk ffo ffp fgd fgf fgg fgp fkf fkg fkk fkp fof fog fok foo fop fpd fpg fpk fpo fpp g-d g-p gdd gdf gdk gdo gdp gfd gff gfk gfo gfp ggd ggg ggo ggp gkd gko gkp god gof gog gok goo gop gpd gpf gpg gpk gpo gpp kdf kdg kdk kdo kdp kfd kff kfg kfo kgd kgf kgo kgp kkk kkp kod kof kog kok koo kop kpd kpf kpk kpo kpp odd odf odg odo odp of- ofd off ofg ofo ofp ogd ogf ogg ogo ogp okd okg okk oko okp oo- ood oof oog ook ooo oop op- opd opf opg opk opo opp p-p pdd pdf pdg pdk pdo pdp pfd pff pfg pfk pfo pfp pgd pgf pgg pgk pgo pgp pkd pkf pkg pko pkp pod pof pog pok poo pop ppd ppf ppg ppk ppo ppp