-er -up ddd dde ddg ddp ddr ddu ddx de- ded dee deg dep der deu dex dgd dge dgg dgp dgr dgu dpd dpe dpg dpp dpr dpu drd dre drg drp drr dru drx dud due dug dup dur dux dxd dxp dxr dxx ed- edd ede edg edp edr edu edx eed eee eeg eep eer eex egd ege egg egp egr egu egx ep- epd epe epg epp epr epu epx erd ere erg erp err eru eu- eud eue eug eup eur eux ex- exd exe exp exr exu exx g-d g-p gdd gde gdp gdr gdu gdx ge- ged gee geg gep ger geu gex ggd ggg ggp ggr ggu gpd gpe gpg gpp gpr gpu gpx grd gre grg grp grr gru grx gu- gud gue gug gup gur guu gxp p-p pdd pde pdg pdp pdr pdu pdx ped pee peg pep per peu pex pgd pge pgg pgp pgr ppd ppe ppg ppp ppr ppu ppx prd pre prg prp prr pru prx pud pue pug pup pur puu pxe pxg pxr rdd rde rdg rdp rdr rdu rdx re- red ree reg rep rer reu rex rgd rge rgg rgp rgr rgx rpd rpe rpg rpp rpr rpu rpx rrd rrg rrp rrr rru rud rue rug rup rur ruu rux rxp rxr udd ude udg udp udr udu udx ued uee ueg uep uer uge ugg ugp ugr ugu ugx up- upd upe upg upp upr upu upx ur- urd ure urg urp urr uru urx uue uug uur uuu uxr uxu xde xdr xed xee xeg xep xer xeu xex xge xgp xpd xpe xpg xpp xrd xrx xue xup xxp xxx