-er -up ddd dde ddf ddo ddp ddr ddu de- ded dee def deo dep der deu dfd dfe dff dfo dfp dfr dfu dod doe dof doo dop dor dou dpd dpe dpf dpo dpp dpr dpu drd dre dro drp drr dru dud due duf duo dup dur ed- edd ede edf edo edp edr edu eed eee eef eeo eep eer ef- efd efe eff efo efp efr eo- eod eoe eof eoo eop eor eou ep- epd epe epf epo epp epr epu erd ere erf ero erp err eru eu- eud eue euf eup eur fdd fde fdf fdo fdp fdr fdu fed fee fef feo fep fer feu ffd ffe fff ffo ffp ffr ffu foe fof foo fop for fou fpd fpe fpo fpp fpr fpu frd fre frf fro frp frr fru fud fue fuf fuo fup fur fuu odd ode odf odo odp odr odu oed oee oef oeo oep oer of- ofd ofe off ofo ofp ofr ofu oo- ood oof ooo oop oor op- opd ope opf opo opp opr or- ord ore orf oro orp orr oru ou- oud oue ouf ouo oup our p-p pdd pde pdf pdo pdp pdr pdu ped pee pef peo pep per peu pfd pfe pff pfo pfp pfr pfu pod poe pof poo pop por pou ppd ppe ppf ppo ppp ppr ppu prd pre prf pro prp prr pru pud pue puf pup pur puu rdd rde rdf rdo rdp rdr rdu re- red ree ref reo rep rer reu rfd rfe rff rfo rfp rfr rfu rod roe rof roo rop ror rou rpd rpe rpf rpo rpp rpr rpu rrd rrf rrp rrr rru rud rue ruf ruo rup rur ruu udd ude udf udo udp udr udu ued uee uef uep uer ufd ufe uff ufo ufp ufr ufu uod uoe uoo uop uor up- upd upe upf upo upp upr upu ur- urd ure urf uro urp urr uru uue uur uuu