-tree e-ten eeeee eeler eener eenet eepee eeten eleet elele elene eleut ellel ellen eller ellet ellul elpee elper elren elten elulu eluru elute enent enete enlen ennet enper enpeu enrut entel enten enter entre enure enurn epeen epene epure ereen erept erere erlen ernen ernet ernle erpel errtu erte ertel erter ertun erupt etern etete etnre etree etrun ettel etten etter ettle eturu euell eulen euler eunet eupen eurel eurre leell leere leert lelep leleu lelle lenne lente lepel leper lepet leppe lepre lept- leren lerer lerne leten letre lette letup letur leupp lueen luen lulle lulte lulul lunel lunet lunne luper luppe lupul luren lurer lurne lurue lurun lurup lute- luter lutte n-p-n neele neelu neere neetu nelle nellu nente neper neple neppe nepte neree neret nerre nerte nerul nerur neten netle netne nette neuen neuer neueu neune neur- neure neurl nlnet ntete ntlet nu-nu nuell nulle nunet nunun nupen nuprl nupur nure- nurlu nurun nutte p-n-p p-rep peele peell peene peent peere peerl peert peete pelee peler pelet pelle pene- pener penne penre pent- pente pentu penup penur pepee pepel peple peppe pept- pepup perel peren perer peret perle perne pernt perre perte perun perur peter petr- petre petru pette petun petur peule peure pleen pleep pleet plene plete pleut pllnt plupp plurn plut- plute pptnt preen prell prelp prene prent prepl prepn prete prntr pruen prun- prune prunt prute pter- ptere ptpre ptprn ptprr ptprt ptpru puett puler pull- pulle pullu pulut punee punel punne punte pupet puple puppe puree purel puren purer purle purre purte purul puten puter putre putt- putte puttu putun putup re-up reene reepe reere relee relet relte relue renee rener renet renne rente repel repen repet reple reppe reprt repun reput rere- reree reret rerun retee retel reter retnr rette reuel reuen reuer reuet reule reune reute rnpep rtenn ruele ruell ruere ruete rueun ruler runer runet runne runte runup rupee rupel ruper ruten ruter rutle rutte rutul ruule ruutu t-nut teele teell teepe teeup tele- telen telep teler teleu tell- telle tenel tenen tener tenet teneu tenne tennu tenpn tente tenue tenup tenur tepee tepet tepeu teppu tepun teret tereu terne terre tert- tetel teten teter tetle tetr- tette tlell tlett tllnn tntnt tpler treen treer treet trele trene trent trepp trept trere trete trett treut truel truer trule trull trupt trute ttnet ttttt tuell tuelt tuene tulet tulle tulun tune- tunel tuner tunne tupee tuple turel turen turet turle turn- turne turnp turnt turnu turre turtu turul turup turut tutee tutel tutle tutte tutun tuuru uelen ulene ulent ullet ullur ulpur ulten ultre ululu uluru unerp unete unlet unnet unnun unnur unnut unpen unpeu unput unrep unrun unten unter unurn upeet upenn uppen upper upput uprun upter urelu urent urtel urter urtlu urupe urutu utenn uter- utter uttur uturn uturu uunet uuuuu