c-p-c ccccc ceere cerc- cerce cerec cerer cerke cerre crece creek creep creer creke crepe crepu creu- creue creup cruce cruck cruke crupe crure cucuk cueup cuker cuper cupr- curce curer curre curup eccup ecker eecke eeeee eepee ekker ekuku ekuru eperc epuku epure erere erkec eruke eucre eurre k-p-r kecer keepe keere kekec keppe kerek kerep kerre kreek kreep kreke krepe kreuk 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 preke preuk prkce pruce puker puppe purce puree purer purku purre re-up recce recep recke recue recur reece reepe reere rekke repec reppe rere- reree reuer rucer ruere rukke rupee ruper rurec u-cee uceku ukeep ukeke upc-e upper urker urpek uruce urucu urupe uuuuu