-er ddd dde ddf ddo ddp ddr ddz de- ded dee def deo dep der dez dfd dfe dff dfo dfp dfr dfz dod doe dof doo dop dor doz dpd dpe dpf dpo dpp dpr dpz drd dre dro drp drr drz dzd dze dzo dzp dzr ed- edd ede edf edo edp edr eed eee eef eeo eep eer ef- efd efe eff efo efp efr eo- eod eoe eof eoo eop eor ep- epd epe epf epo epp epr epz erd ere erf ero erp err erz eze ezf ezo ezr ezz fdd fde fdf fdo fdp fdr fed fee fef feo fep fer fez ffd ffe fff ffo ffp ffr ffz foe fof foo fop for foz fpd fpe fpo fpp fpr frd fre frf fro frp frr fzd odd ode odf odo odp odr oed oee oef oeo oep oer of- ofd ofe off ofo ofp ofr ofz oo- ood oof ooo oop oor op- opd ope opf opo opp opr or- ord ore orf oro orp orr orz oze ozo ozz p-p pdd pde pdf pdo pdp pdr pdz ped pee pef peo pep per pez pfd pfe pff pfo pfp pfr pod poe pof poo pop por poz ppd ppe ppf ppo ppp ppr ppz prd pre prf pro prp prr prz pzp rdd rde rdf rdo rdp rdr re- red ree ref reo rep rer rez rfd rfe rff rfo rfp rfr rfz rod roe rof roo rop ror roz rpd rpe rpf rpo rpp rpr rpz rrd rrf rrp rrr rze rzo zdf zed zee zef zeo zep zer zez zfd zfr zo- zod zoe zof zoo zor zpe zpf zpo zpp zpr zro zrp zzr zzz