bbbee bccup be-er beber becue beebe beppe beppu berbe bercu berec berre berru beuer beure brebu brece breer brere breu- brrrr bruce bruer bubbe buber bucur burcu burru buruc c-p-c ccccc cebec ceber cebpb cebpe ceere cerbu cerc- cerce cerec cerer cerre crebe crece creep creer crepe crepu creu- creue creup cruce crupe crure cubbe cubeb cuber cubub cueup cuper cupr- curce curer curre curup ebber ebure eccup eeeee eepee eperc epure erbbe erber erere eucre eurre p-rep pebre peebu peece peere pepee peppe pepup perce perec perer perre peruc perur peuce peure prece pruce puber puppe purce puree purer purre re-up rebbe rebec reber recce recep recue recur reece reepe reere repec reppe repub rere- reree reuer rubee ruber rubup rucer ruere rupee ruper rurec u-cee uber- upc-e upper urubu uruce urucu urupe uuuuu