b-r-k bbbee be-er bebek beber beebe beeke begee begge begue begur beker bekke beppe beppu berbe bereg berek berge berk- berke berre berru beuer beure brebu breek breer breg- brege bregg breke brere breu- brrrr bruer bruge brugg bruke bubbe buber buger bugge bugre buker bukk- burek burge burgk burgu burke burru buruk ebber eberg ebure eeeee eepee egger egrek ekker ekuku ekuru epuku epure erbbe erber erege erere eruke eurre gbeke gberg gberu gbpee geber gebke gebre gebur geere geeup gegge gerbe gerke gerre grebe greek greer grege gregg grepe greup grgur grrrr grubb grube grure gubbe guber gubru guere gurge gurke gurre gurur k-gee k-p-r kebbe kebek keber keepe keere keppe kerek kerep kergu kerre krbpe kreek kreep kreke krepe kreuk kruge krupp kubek kuber kugur kukup kukur kuper kuppe kupur kurbu kurek kurku kurre kuruk kurup p-rep pebre peebu peege peeke peere pekre pepee peppe pepup perer perge perke perre perur peure pgrep pre-k preke prepg preuk puber puker puppe puree purer purge purku purre re-up rebbe rebeg reber reege reepe reere reger regge regur rekke repeg reppe repub rere- reree reuer rubee ruber rubke rubup ruegg ruere ruger rugge rukke rupee ruper uber- ugrug ukeep ukeke ukuug upper urger urker urpek urubu urupe uuuuu