-tree ddddd dedde dedee deder dedur dedut deede deere derde dered derre derue deter detre dette detur deure deut- drdre dredd drede dreed drere dreux drude duded duder duere duerr duete duett dured duree durer duret durex durre durte durtu dutte dxdxd e-dee edder eddre edere edred eeeee eerde erdre erdut erede erere erred errtu erte erter etete etext etree etter etude eturu eurex eurre exede exert exred exter extre extue exude exute redde reder redex redur redux reede reere rerde rere- reree reret reted retee reter retex rette reuer reuet reute rexer rtext ruder ruede ruere ruete rurde ruter rutte ruutu t-rex teder teerd teret tereu terex terre tert- teter tetex tetr- tette texed texrd texte treed treer treet trere trete trett treut treux trude trued truer truex trute truxe ttttt tuder tudre tudur turet turre turtu turut tutee tutte tuuru tuxed udder udert urdee urter urutu uter- utter uttur uturu uuuuu xedre xerte xetex xexeu xexex xtext xtree