-er -up ddd dde ddg ddo ddp ddr ddu de- ded dee deg deo dep der deu dgd dge dgg dgp dgr dgu dod doe dog doo dop dor dou dpd dpe dpg dpo dpp dpr dpu drd dre drg dro drp drr dru dud due dug duo dup dur ed- edd ede edg edo edp edr edu eed eee eeg eeo eep eer egd ege egg ego egp egr egu eo- eod eoe eog eoo eop eor eou ep- epd epe epg epo epp epr epu erd ere erg ero erp err eru eu- eud eue eug eup eur g-d g-p gdd gde gdo gdp gdr gdu ge- ged gee geg geo gep ger geu ggd ggg ggo ggp ggr ggu god goe gog goo gop gor gou gpd gpe gpg gpo gpp gpr gpu grd gre grg gro grp grr gru gu- gud gue gug guo gup gur guu odd ode odg odo odp odr odu oed oee oeg oeo oep oer ogd oge ogg ogo ogp oo- ood oog ooo oop oor op- opd ope opg opo opp opr or- ord ore org oro orp orr oru ou- oud oue ouo oup our p-p pdd pde pdg pdo pdp pdr pdu ped pee peg peo pep per peu pgd pge pgg pgo pgp pgr pod poe pog poo pop por pou ppd ppe ppg ppo ppp ppr ppu prd pre prg pro prp prr pru pud pue pug pup pur puu rdd rde rdg rdo rdp rdr rdu re- red ree reg reo rep rer reu rgd rge rgg rgo rgp rgr rod roe rog roo rop ror rou rpd rpe rpg rpo rpp rpr rpu rrd rrg rrp rrr rru rud rue rug ruo rup rur ruu udd ude udg udo udp udr udu ued uee ueg uep uer uge ugg ugo ugp ugr ugu uod uoe uog uoo uop uor up- upd upe upg upo upp upr upu ur- urd ure urg uro urp urr uru uue uug uur uuu