-er ddd dde ddg ddm ddo ddr de- ded dee deg dem deo der dgd dge dgg dgm dgr dmd dme dmg dmm dmo dmr dod doe dog dom doo dor drd dre drg drm dro drr ed- edd ede edg edm edo edr eed eee eeg eem eeo eer egd ege egg egm ego egr em- emd eme emg emm emo emr eo- eod eoe eog eom eoo eor erd ere erg erm ero err g-d gdd gde gdm gdo gdr ge- ged gee geg gem geo ger ggd ggg ggm ggo ggr gmd gme gmg gmm gmo gmr god goe gog gom goo gor grd gre grg grm gro grr m-o m-r mdd mde mdg mdm mdo mdr med mee meg mem meo mer mgd mge mgm mgo mgr mmd mme mmg mmm mmo mmr mod moe mog mom moo mor mrd mre mrg mrm mro mrr odd ode odg odm odo odr oed oee oeg oem oeo oer ogd oge ogg ogo om- omd ome omg omm omo omr oo- ood oog oom ooo oor or- ord ore org orm oro orr rdd rde rdg rdm rdo rdr re- red ree reg rem reo rer rgd rge rgg rgo rgr rmd rme rmg rmm rmo rmr rod roe rog rom roo ror rrd rrg rrm rrr