-tree bbbee be-er beber beebe beene beete beeut bene- benet 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 breen breer breet brene brenn brent brere brett breu- brrrr bruen bruer bruet brune brunn brunt brute bruun btr-t bubbe buben buber 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 enbun enent enete ennet enrut enten enter entre enure enurn erbbe erben erber ereen erere ernen ernet errtu erte erter ertun etern etete etnre etree etrun etten etter eturu eunet eurre neber nebet nebtu neere neetu nente neree neret nerre nerte nerur neten netne nette neuen neuer neueu neune neur- neure nnebe ntete nu-nu nunet nunun nure- nurun nutte rebbe reber rebet rebun rebut reene reere renee rener renet renne rente rere- reree reret rerun retee reter retnr rette reuen reuer reuet reune reute rtenn rubee ruben ruber ruere ruete rueun runer runet runne runte ruten ruter rutte ruutu t-nut tbtbt tbutt teber tebet tenen tener tenet teneu tenne tennu tente tenue tenur teret tereu terne terre tert- teten teter tetr- tette tntnt treen treer treet trene trent trere trete trett treut trubu truer trute ttnet ttttt tuber tuene tune- tuner tunne turbe turbt turen turet turn- turne turnt turnu turre turtu turut tutee tutte tutun tuuru ubeen uber- unbet unete unnet unnun unnur unnut unrun unten unter unurn urent urter urubu urutu utenn uter- utter uttur utube uturn uturu uunet uuuuu