-tree ddddd dedde dedee deder dedur dedut deede deefe deeff deere defed defer defet deffe derde dered derre derue deter detre dette detur deure deut- drdre dredd drede dreed dreff dreft drere drude duded duder duere duerr duete duett dufur dured duree durer duret durre durte durtu dutte e-dee edder eddre edere edred eeeee eefde eerde ef-tu efere efetf effed effer effet efter efuru efutu erdre erdut erede erere erfde erred errtu erte erter etete etree etter etude eturu eurre fedde fedee feder feere ferde fered feret ferr- ferre ferte feted feter fette feued feuer feute frede freed freer freet frere frett freud freur frude frute ftrtt fu-fu fudde fuddu furde furud futur redde reder redur reede reefe reeft reere refed refer refet reffe refut rerde rere- reree reret reted retee reter rette reuer reuet reute ruder ruede ruere ruete ruffe rurde ruter rutte ruutu tedef teder teerd tefe teret tereu terre tert- teter tetr- tette treed treer treet trefe treff trere trete trett treut trude trued truer truff trute ttttt tuder tudre tudur tuffe tufte turet turre turtu turut tutee tutte tuuru udder udert ufere urdee urter urutu uter- utter uttur uturu uuuuu