ddd dde ddf ddo ddp de- ded dee def deo dep dfd dfe dff dfo dfp dod doe dof doo dop dpd dpe dpf dpo dpp ed- edd ede edf edo edp eed eee eef eeo eep ef- efd efe eff efo efp eo- eod eoe eof eoo eop ep- epd epe epf epo epp fdd fde fdf fdo fdp fed fee fef feo fep ffd ffe fff ffo ffp foe fof foo fop fpd fpe fpo fpp odd ode odf odo odp oed oee oef oeo oep of- ofd ofe off ofo ofp oo- ood oof ooo oop op- opd ope opf opo opp p-p pdd pde pdf pdo pdp ped pee pef peo pep pfd pfe pff pfo pfp pod poe pof poo pop ppd ppe ppf ppo ppp