-tree bbbee be-er beber beebe beene beete beeut bene- benet benne bennu benue benun benur benut bepen beppe beppu berbe beren beret berne bernt berre berru berte berun betee beten beter betne betre bett- bette beuer beure beute bpeen 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 eepee eeten enbun enent enete ennet enper enpeu enrut enten enter entre enure enurn epeen epene epptb epure erbbe erben erber ereen erept erere ernen ernet errtu erte erter ertun erupt etern etete etnre etree etrun etten etter eturu eunet eupen eurre n-p-n neber nebet nebpu nebtu neere neetu nente neper neppe nepte neree neret nerre nerte nerur neten netne nette neuen neuer neueu neune neur- neure nnebe ntete nu-nu nunet nunun nupen nupur nure- nurun nutte p-n-p p-rep pebre peebu peene peent peere peert peete pene- pener penne penre pent- pente pentu penup penur pepee peppe pept- pepup peren perer peret perne pernt perre perte perun perur petbe peter petr- petre petru pette petun petur peure pptnt preen prene prent prepn prete prntr pruen prun- prune prunt prute pter- ptere ptprb ptpre ptprn ptprr ptprt ptpru puber puett punbb punee punne punte pupet puppe puree puren purer purre purte puten puter putre putt- putte puttu putun putup re-up rebbe reber rebet rebun rebut reene reepe reere renbp renee rener renet renne rente repen repet reppe reprt repub repun reput rere- reree reret rerun retee reter retnr rette reuen reuer reuet reune reute rnpep rtenn rubee ruben ruber rubup ruere ruete rueun runer runet runne runte runup rupee ruper ruten ruter rutte ruutu t-nut tbtbt tbutt teber tebet teepe teeup tenen tener tenet teneu tenne tennu tenpn tente tenue tenup tenur tepee tepet tepeu teppu tepun teret tereu terne terre tert- teten teter tetr- tette tntnt treen treer treet trene trent trepp trept trere trete trett treut trubu truer trupt trute ttnet ttttt tuber tuene tune- tuner tunne tupee turbe turbt turen turet turn- turne turnp turnt turnu turre turtu turup turut tutee tutte tutun tuuru ubeen uber- unbet unerp unete unnet unnun unnur unnut unpen unpeu unput unrep unrun unten unter unurn upeet upenn uppen upper upput uprun upter urent urter urubu urupe urutu utenn uter- utter uttur utube uturn uturu uunet uuuuu