c-p-c ccccc ceere cefcu cerc- cerce cerec cerer cerke cerre cfu-e cpcfc crece creek creep creer creke crepe crepu creu- creue creup cruce cruck crufe cruke crupe crure cucuk cueup cufeu cuffe cufre cuker cuper cupr- curce curer curre curup eccup ecker eecke eeeee eepee efere effer efuru ekker ekuku ekuru eperc epuku epure erere erkec eruke eucre eurre feere ferce ferr- ferre feuer frcpc freck freek freep freer freke frere freur fu-fu k-p-r kecer keefe keepe keere kefee kekec keppe kerek kerep kerre kreef kreek kreep kreke krepe kreuk krufc krupp kucer kucuk kukec kukup kukur kupce kuper kuppe kupur kurek kurku kurre kuruc kuruk kurup p-rep pecke peece peeke peere pekre pepee peppe pepup perce perec perer perke perre peruc perur peuce peure pre-k prece preef preff preke preuk prkce pruce puker puppe purce puree purer purku purre re-up recce recep recke recue recur reece reefe reepe reere refer reffe rekke repec reppe rere- reree reuer rperf rucer ruere ruffe rukke rupee ruper rurec u-cee uceku ufere ukeep ukeke upc-e upper urker urpek uruce urucu urupe uuuuu