b-r-k bbbee be-er bebek beber beebe beeke begee begge begue begur beker bekke 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 egger egrek ekker ekuku ekuru erbbe erber erege erere eruke eurre gbeke gberg gberu geber gebke gebre gebur geere gegge gerbe gerke gerre grebe greek greer grege gregg grgur grrrr grubb grube grure gubbe guber gubru guere gurge gurke gurre gurur k-gee kebbe kebek keber keere kerek kergu kerre kreek kreke kreuk kruge kubek kuber kugur kukur kurbu kurek kurku kurre kuruk rebbe rebeg reber reege reere reger regge regur rekke rere- reree reuer rubee ruber rubke ruegg ruere ruger rugge rukke uber- ugrug ukeke ukuug urger urker urubu uuuuu