dddd ddes ddss dedd dede dedu deed dees des- dese dess desu deue deus deux dex- dexe dudd dude duds dudu dues duse dxds dxed dxes dxss dxue dxxx edde edds ede- edes edex edss eede eedu eeee eees eese esds esdu esdx esee eses esse essu esus eude euse exed exes sdds sdes sdss sdsu se-d se-e se-s se-u se-x sede seds seed sees seeu seex sese sess seux sex- sexe ssdd ssee sses ssex ssss sudd sude suds sued suee sues sueu sus- susd suse suss susu suus sux- suxe sxde udds udsd uess usde usds used usee uses usse usss ussu usus uuuu uxue uxus x-ed xeus xexe xuxu xxxx