ddd dde ddg ddo ddx de- ded dee deg deo dex dgd dge dgg dod doe dog doo dox dxd dxo dxx ed- edd ede edg edo edx eed eee eeg eeo eex egd ege egg ego egx eo- eod eoe eog eoo ex- exd exe exo exx g-d gdd gde gdo gdx ge- ged gee geg geo gex ggd ggg ggo god goe gog goo gox odd ode odg odo oed oee oeg oeo oex ogd oge ogg ogo ogx oo- ood oog ooo oox ox- oxo oxx xde xed xee xeg xex xge xod xog xoo xox xxo xxx