b-r-k bbbee bccup be-er bebek beber becke becue beebe beeke beker bekke beppe beppu berbe berck bercu berec berek berk- berke berre berru beuer beure brebu brece breck breek breer breke brere breu- brrrr bruce bruck bruer bruke bubbe buber bucek bucku bucur buker bukk- burck burcu burek burke burru buruc buruk c-p-c ccccc cebec ceber cebpb cebpe ceere cerbu cerc- cerce cerec cerer cerke cerre crebe crece creek creep creer creke crepe crepu creu- creue creup cruce cruck cruke crupe crure cubbe cubeb cuber cubub cucuk cueup cuker cuper cupr- curce curer curre curup ebber ebure eccup ecker eecke eeeee eepee ekker ekuku ekuru eperc epuku epure erbbe erber erere erkec eruke eucre eurre k-p-r kebbe kebek keber kecer keepe keere kekec keppe kerek kerep kerre krbpe kreek kreep kreke krepe kreuk krupp kubek kuber kucer kucuk kukec kukup kukur kupce kuper kuppe kupur kurbu kurek kurku kurre kuruc kuruk kurup p-rep pebre pecke peebu peece peeke peere pekre pepee peppe pepup perce perec perer perke perre peruc perur peuce peure pre-k prece preke preuk prkce pruce puber puker puppe purce puree purer purku purre re-up rebbe rebec reber recce recep recke recue recur reece reepe reere rekke repec reppe repub rere- reree reuer rubee ruber rubke rubup rucer ruere rukke rupee ruper rurec u-cee uber- uceku ukeep ukeke upc-e upper urker urpek urubu uruce urucu urupe uuuuu