-tree ddddd dedde dedee deder dedur dedut deede deepe deepp deepu deere depue derde dered derpt derre derue deter detre dette detur deure deut- drdre dredd drede dreed dreep drepe drere drude drupe duded duder duere duerr duete duett dueup duped duper dured duree durer duret durre durte durtu dutte e-dee edder eddre edere edred eeeee eeped eepee eerde epure erdre erdut erede erept erere erred errtu erte erter erupt etete etree etter etude eturu eurre p-rep pedee peedu peere peert peete pepee peppe pept- pepup perde perdu perer peret perre perte perur peter petr- petre petru pette petur peude peure prede prepd prete prude prute pter- ptere ptprd ptpre ptprr ptprt ptpru pudde puder pudur puett pupet puppe pured puree purer purre purte puter putre putt- putte puttu putup re-up redde reder redup redur reede reepe reere repet reppe reprt reptd reput rerde rere- reree reret reted retee reter rette reuer reuet reute ruder ruede ruere ruete rupee ruper rurde ruter rutte ruutu teder teepe teerd teeup tepee tepet tepeu teppu teret tereu terre tert- teter tetr- tette treed treer treet trepp trept trere trete trett treut trude trued truer trupt trute ttttt tuder tudre tudur tupee turet turre turtu turup turut tutee tutte tuuru udder udept udert upedu upeet upped upper upput upter urdee urter urupe urutu uter- utter uttur uturu uuuuu