-er -up ddd dde ddg ddp ddr ddu de- ded dee deg dep der deu dgd dge dgg dgp dgr dgu dpd dpe dpg dpp dpr dpu drd dre drg drp drr dru dud due dug dup dur ed- edd ede edg edp edr edu eed eee eeg eep eer egd ege egg egp egr egu ep- epd epe epg epp epr epu erd ere erg erp err eru eu- eud eue eug eup eur g-d g-p gdd gde gdp gdr gdu ge- ged gee geg gep ger geu ggd ggg ggp ggr ggu gpd gpe gpg gpp gpr gpu grd gre grg grp grr gru gu- gud gue gug gup gur guu p-p pdd pde pdg pdp pdr pdu ped pee peg pep per peu pgd pge pgg pgp pgr ppd ppe ppg ppp ppr ppu prd pre prg prp prr pru pud pue pug pup pur puu rdd rde rdg rdp rdr rdu re- red ree reg rep rer reu rgd rge rgg rgp rgr rpd rpe rpg rpp rpr rpu rrd rrg rrp rrr rru rud rue rug rup rur ruu udd ude udg udp udr udu ued uee ueg uep uer uge ugg ugp ugr ugu up- upd upe upg upp upr upu ur- urd ure urg urp urr uru uue uug uur uuu