-tree bbbee be-er beber becue becut beebe beene beete beeut bence bene- benet benne bennu benue benun benur benut berbe bercu berec beren beret berne bernt berre berru berte berun betee beten beter betne betre bett- bette beuer beure beute brebu brece breen breer breet brene brenn brent brere brett breu- brrrr bruce bruen bruer bruet brune brunn brunt brute bruun btc-e btr-t bubbe buben buber bucet bucur bunce bunne bunte bunun bunut burcu buren buret burn- burne burnt burru burte burtt buruc burun burut butec buten buter butte butut c-tec ccccc ccett ccnet cebec ceber cecun ceene ceere cence ceneu cent- centr cerbu cerc- cerce cerec ceren cerer ceret cerne cerre certe ceten cette cetun cneru cnnnn cntrc crebe crece creen creer cren- crete cretu creu- creue crnce crnec crner cruce cruet crune crunt crure cten- ctene ctree cttee cubbe cubeb cuber cubub cunne cunt- cunut curce curer curet curre cutcu cutee cuter e-ten ebber ebbet ebene ebern ebert ebner ebure eccen eeeee eence eener eenet eeten enbun encre encur enent enete ennet enrut enten enter entre enure enurn erbbe erben erber erect ereen erere ernen ernet errtu erte erter ertun eruct etern etete etnre etree etrun etten etter eturu eucen eucre eunet eurre ncree ncube neber nebet nebtu necr- nect- neece neere neetu nente neree neret nerre nerte nerur neten netne nette neuen neuer neueu neune neur- neure nnebe ntete nu-nu nucet nunce nunet nunun nurce nure- nurun nutec nutte rebbe rebec reber rebet rebun rebut recce recen recet rect- recte recue recur recut reece reene reere rence renee rener renet renne rente rere- reree reret rerun retee reter retnr rette reuen reuer reuet reune reute rtenn rubee ruben ruber rucer ruere ruete rueun runcu runec runer runet runne runte rurec ruten ruter rutte ruutu t-nut tbtbt tbutt teber tebet tecn- tecnu tectb tenbc tencc tence tenen tener tenet teneu tenne tennu tente tenue tenur terce teret tereu terne terre tert- teten teter tetr- tette tntnt treen treer treet trenc trene trent trere trete trett treut trubu truce truer trute ttnet ttttt tuber tucet tuctu tuene tune- tuner tunne turbe turbt turen turet turn- turne turnt turnu turre turtu turut tutee tutte tutun tuuru u-cee ubeen uber- unbet uncut unete unnet unnun unnur unnut unrun unten unter unurn urent urter urubu uruce urucu urutu utenn uter- utter uttur utube uturn uturu uunet uuuuu