eeeee eener eepee enper enpeu enure enurn epeen epene epure ereen erere ernen eupen eurre n-p-n neere neper neppe neree nerre nerur neuen neuer neueu neune neur- neure nu-nu nunun nupen nupur nure- nurun p-n-p p-rep peene peere pene- pener penne penre penup penur pepee peppe pepup peren perer perne perre perun perur peure preen prene prepn pruen prun- punee punne puppe puree puren purer purre re-up reene reepe reere renee rener renne repen reppe repun rere- reree rerun reuen reuer reune rnpep ruere rueun runer runne runup rupee ruper unerp unnun unnur unpen unpeu unrep unrun unurn upenn uppen upper uprun urupe uuuuu