-tree bbbee be-er beber beebe beeft beene beete beeut beffe befur bene- benet benfe benne bennu benue benun benur benut berbe beren beret berne bernt berre berru berte berun betee beten beter betne betre bett- bette beuer beure beute brebu breef breen breer breet brene brenn brent brere brett breu- brrrr bruen bruer bruet bruff brune brunn brunt brute bruun btr-t bubbe buben buber bufet buffe bunne bunte bunun bunut buren buret burn- burne burnt burru burte burtt burun burut buten buter butte butut e-ten ebber ebbet ebene ebern ebert ebner ebure eeeee eener eenet eeten ef-tu efere efetf effer effet efnet efren eften efter efuru efutu enbun enent enete enfer enfeu ennet enrut enten enter entre enuff enure enurn erbbe erben erber ereen erere ernen ernet errtu erte erter ertun etern etete etnre etree etrun etten etter eturu eunet eurre febre feere fener feneu fenne feren feret ferr- ferre ferte feter fette feuer feute freer freet frere frett freur frunt frute ftrtt fu-fu funen funet furen futur neber nebet nebtu neere neetu nefen nefer neffe nefre nefte nente neree neret nerre nerte nerur neten netne nette neuen neuer neueu neuft neune neur- neure nnebe ntete nu-nu nunet nunun nure- nurun nutte rebbe reber rebet rebun rebut reefe reeft reene reere refen refer refet reffe refne refut renee rener renet renfe renne rente rere- reree reret rerun retee reter retnr rette reuen reuer reuet reune reute rtenn rubee ruben ruber ruere ruete rueun ruffe runer runet runne runte ruten ruter rutte ruutu t-nut tbtbt tbutt teber tebet tefe tefen tenen tener tenet teneu tenne tennu tente tenue tenur teret tereu terne terre tert- teten teter tetr- tette tntnt treen treer treet trefe treff trene trent trere trete trett treut trubu truer truff trute ttnet ttttt tuber tuene tuffe tufte tune- tuner tunne turbe turbt turen turet turn- turne turnt turnu turre turtu turut tutee tutte tutun tuuru ubeen uber- ufere unbet unete unfun unfur unnet unnun unnur unnut unref unrun unten unter unurn urent urter urubu urutu utenn uter- utter uttur utube uturn uturu uunet uuuuu