-tree e-ten eeeee eeler eener eenet eeten ef-tu efere efetf effer effet efnet efren eftel eften efter efuru efutu eleet elele elene eleut elfen ellel ellen eller ellet ellul elren elten elulu eluru elute enent enete enfer enfeu enlen ennet enrut entel enten enter entre enuff enure enurn ereen erere erlen ernen ernet ernle errtu erte ertel erter ertun etern etete etnre etree etrun ettel etten etter ettle eturu euell eulen euler eunet eurel eurre feele feeln feere felet felle felte feltt fener feneu fenne ferel feren feret ferle ferr- ferre ferte fetel feter fette feuer feule feute fleen fleer fleet flene flent flenu flere flert flete flett fleur fluff flure flurn flurr flurt flute freel freer freet frere frett freur frunt frute ftlee ftrtt fu-fu fulen fulle fullf funel funen funet furel furen futur leell leere leert lefeu leffe leful leleu lelle lenne lente leren lerer lerne leten letre lette letur lueen luen lufre lufte lulle lulte lulul lunel lunet lunne luren lurer lurne lurue lurun lute- luter lutte neele neelu neere neetu nefen nefer neffe nefre nefte nelle nellu nente neree neret nerre nerte nerul nerur neten netle netne nette neuen neuer neueu neuft neune neur- neure neurl nfler nlnet ntete ntlet nu-nu nuell nulle nunet nunun nure- nurlu nurun nutte reefe reeft reene reere refel refen refer refet reffe refne refut relee relet relte relue renee rener renet renfe renne rente rere- reree reret rerun retee retel reter retnr rette reuel reuen reuer reuet reule reune reute rtenn ruele ruell ruere ruete rueun ruffe ruler runer runet runne runte ruten ruter rutle rutte rutul ruule ruutu t-nut teele teell tefe tefen tele- telen teler teleu tell- telle tenel tenen tener tenet teneu tenne tennu tente tenue tenur teret tereu terne terre tert- tetel teten teter tetle tetr- tette tlell tlett tllnn tntnt treen treer treet trefe treff trele trene trent trere trete trett treut truel truer truff trule trull trute ttnet ttttt tuelf tuell tuelt tuene tuffe tufte tulet tulle tulun tune- tunel tuner tunne turel turen turet turle turn- turne turnt turnu turre turtu turul turut tutee tutel tutle tutte tutun tuuru uelen uelfe ufere ulene ulent ullet ullur ulten ultre ululu uluru unete unfun unfur unlet unnet unnun unnur unnut unref unrun unten unter unurn urelu urent urtel urter urtlu urutu utenn uter- utter uttur uturn uturu uunet uuuuu