bbbee be-er beber beebe begee begge begue begur beppe beppu berbe bereg berge berre berru beuer beure brebu breer breg- brege bregg brere breu- brrrr bruer bruge brugg bubbe buber buger bugge bugre burge burgu burru ebber eberg ebure eeeee eepee egger epure erbbe erber erege erere eurre gberg gberu gbpee geber gebre gebur geere geeup gegge gerbe gerre grebe greer grege gregg grepe greup grgur grrrr grubb grube grure gubbe guber gubru guere gurge gurre gurur p-rep pebre peebu peege peere pepee peppe pepup perer perge perre perur peure pgrep prepg puber puppe puree purer purge purre re-up rebbe rebeg reber reege reepe reere reger regge regur repeg reppe repub rere- reree reuer rubee ruber rubup ruegg ruere ruger rugge rupee ruper uber- ugrug upper urger urubu urupe uuuuu