-tree eeeee eeler ef-tu efere efetf effer effet eftel efter efuru efutu eleet elele eleut ellel eller ellet ellul elulu eluru elute erere errtu erte ertel erter etete etree ettel etter ettle eturu euell euler eurel eurre feele feere felet felle felte feltt 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 freer freet frere frett freur frute ftlee ftrtt fu-fu fulle fullf furel futur leell leere leert lefeu leffe leful leleu lelle lerer letre lette letur lufre lufte lulle lulte lulul lurer lurue lute- luter lutte reefe reeft reere refel refer refet reffe refut relee relet relte relue rere- reree reret retee retel reter rette reuel reuer reuet reule reute ruele ruell ruere ruete ruffe ruler ruter rutle rutte rutul ruule ruutu teele teell tefe tele- teler teleu tell- telle teret tereu terre tert- tetel teter tetle tetr- tette tlell tlett treer treet trefe treff trele trere trete trett treut truel truer truff trule trull trute ttttt tuelf tuell tuelt tuffe tufte tulet tulle turel turet turle turre turtu turul turut tutee tutel tutle tutte tuuru uelfe ufere ullet ullur ultre ululu uluru urelu urtel urter urtlu urutu uter- utter uttur uturu uuuuu