bbbee be-er beber beebe beene bene- benne bennu benue benun benur bepen beppe beppu berbe beren berne berre berru berun beuer beure bpeen brebu breen breer brene brenn brere breu- brrrr bruen bruer brune brunn bruun bubbe buben buber bunne bunun buren burn- burne burru burun ebber ebene ebern ebner ebure eeeee eener eepee enbun enper enpeu enure enurn epeen epene epure erbbe erben erber ereen erere ernen eupen eurre n-p-n neber nebpu neere neper neppe neree nerre nerur neuen neuer neueu neune neur- neure nnebe nu-nu nunun nupen nupur nure- nurun p-n-p p-rep pebre peebu peene peere pene- pener penne penre penup penur pepee peppe pepup peren perer perne perre perun perur peure preen prene prepn pruen prun- prune puber punbb punee punne puppe puree puren purer purre re-up rebbe reber rebun reene reepe reere renbp renee rener renne repen reppe repub repun rere- reree rerun reuen reuer reune rnpep rubee ruben ruber rubup ruere rueun runer runne runup rupee ruper ubeen uber- unerp unnun unnur unpen unpeu unrep unrun unurn upenn uppen upper uprun urubu urupe uuuuu