bbbee be-er beber becue beebe beene bence bene- benne bennu benue benun benur berbe bercu berec beren berne berre berru berun beuer beure brebu brece breen breer brene brenn brere breu- brrrr bruce bruen bruer brune brunn bruun bubbe buben buber bucur bunce bunne bunun burcu buren burn- burne burru buruc burun ccccc cebec ceber cecun ceene ceere cence ceneu cerbu cerc- cerce cerec ceren cerer cerne cerre cneru cnnnn crebe crece creen creer cren- creu- creue crnce crnec crner cruce crune crure cubbe cubeb cuber cubub cunne curce curer curre ebber ebene ebern ebner ebure eccen eeeee eence eener enbun encre encur enure enurn erbbe erben erber ereen erere ernen eucen eucre eurre ncree ncube neber necr- neece neere neree nerre nerur neuen neuer neueu neune neur- neure nnebe nu-nu nunce nunun nurce nure- nurun rebbe rebec reber rebun recce recen recue recur reece reene reere rence renee rener renne rere- reree rerun reuen reuer reune rubee ruben ruber rucer ruere rueun runcu runec runer runne rurec u-cee ubeen uber- unnun unnur unrun unurn urubu uruce urucu uuuuu