-tree eeeee eeler eepee ef-tu efere efetf effer effet eftel efter efuru efutu eleet elele eleut ellel eller ellet ellul elpee elper elulu eluru elute eptfe epure erept erere erpel errtu erte ertel erter erupt etete etree ettel etter ettle eturu euell euler eurel eurre feele feere felet felle felte feltt felup ferel feret ferle ferr- ferre ferte fetel feter fette feuer feule feute fleer fleet flere flert flete flett fleur fluff flure flurr flurt flute freel freep freer freet frere frett freur frute ftlee ftrtt fu-fu fulle fullf fulup furel futur leell leere leert lefeu leffe leful lelep leleu lelle lepel leper lepet leppe lepre lept- lerer letre lette letup letur leupp lufre lufte lulle lulte lulul luper luppe lupul lurer lurue lurup lute- luter lutte p-rep peele peell peere peerl peert peete pelee peler pelet pelle pepee pepel peple peppe pept- pepup perel perer peret perle perre perte perur peter petr- petre petru pette petur peule peure pfuel pleep pleet plete pleut pluff plupp plut- plute preef preff prell prelp prepl prete prute pter- ptere ptpre ptprf ptprr ptprt ptpru puett puler pull- pulle pullu pulut pupet puple puppe puree purel purer purle purre purte purul puter putre putt- putte puttu putup re-up reefe reeft reepe reere refel refer refet reffe refut relee relet relte relue repel repet reple reppe reprt reput rere- reree reret retee retel reter rette reuel reuer reuet reule reute rperf ruele ruell ruere ruete ruffe ruler rupee rupel ruper ruter rutle rutte rutul ruule ruutu teele teell teepe teeup tefe tele- telep teler teleu tell- telle tepee tepet tepeu teppu teret tereu terre tert- tetel teter tetle tetr- tette tlell tlett tpler treer treet trefe treff trele trepp trept trere trete trett treut truel truer truff trule trull trupt trute ttttt tuelf tuell tuelt tuffe tufte tulet tulle tupee tuple turel turet turle turre turtu turul turup turut tutee tutel tutle tutte tuuru uelfe ufere ullet ullur ulpur ultre ululu uluru upeet upper upput upter urelu urtel urter urtlu urupe urutu uter- utter uttur uturu uuuuu