b-r-k bbbee be-er bebek beber beebe beeke beker bekke beppe beppu berbe berek berk- berke berre berru beuer beure brebu breek breer breke brere breu- brrrr bruer bruke bubbe buber buker bukk- burek burke burru buruk ebber ebure eeeee eepee ekker ekuku ekuru epuku epure erbbe erber erere eruke eurre k-p-r kebbe kebek keber keepe keere keppe kerek kerep kerre krbpe kreek kreep kreke krepe kreuk krupp kubek kuber kukup kukur kuper kuppe kupur kurbu kurek kurku kurre kuruk kurup p-rep pebre peebu peeke peere pekre pepee peppe pepup perer perke perre perur peure pre-k preke preuk puber puker puppe puree purer purku purre re-up rebbe reber reepe reere rekke reppe repub rere- reree reuer rubee ruber rubke rubup ruere rukke rupee ruper uber- ukeep ukeke upper urker urpek urubu urupe uuuuu