-tree b-r-k bbbee be-er bebek bebel beber beebe beeke beele beete beeut begee beget begge begle begue begur begut beker bekke belee beleg belek belet belge bellb belle belue belur belut berbe bereg berek berel beret berge berk- berke berle berre berru berte betee betel beter betke betle betre bett- bette betul beuer beule beure beute bleek bleer bleet bleke blekk blere blete bleue bluer bluet bluke blurb blure blurr blurt brebu breek breel breer breet breg- brege bregg breke brell brere brett breu- brrrr bruer bruet bruge brugg bruke brule brull brute btr-t bubbe buber buble buell buger bugge bugle bugre buker buket bukk- bulb- bulge bulke bull- bulle bulul bulut burek burel buret burge burgk burgu burke burle burru burte burtt buruk burut buter butke butle butte butut ebber ebbet ebble ebell eberg eberl ebert eblul ebull ebure eeeee eeler egger egrek egret ekker ekuku ekuru eleet elegu elele eleut elge elgee elger ellek ellel eller ellet ellul eltek elulu eluru elute erbbe erber erege erere erkel errtu erte ertel erter ertug eruke eteke etete etree etrek ettel etter ettle eturu euell euler eurel eurre gbeke gberg gberu gebel geber gebet gebke gebre gebur geere geert geete gegge gelee geler gelle gelru gelug gerbe gerke gerle gerre gertt getee geter gette getuk ggulu glebe gleek gleer gleet glegg gleke glele glere glete glett glubb gluek gluer glut- glute glutt grebe greek greer greet grege gregg grell grete gretl grett greut grgur grrrl grrrr grubb grube gruel grure gruut gtk-- gtube gubbe guber gubru guell guelt guere gugel gugul gulek guler gulet gulle gulte gurge gurke gurle gurlt gurre gurur gutte k-gee k-t-b k-tel k-ute kebbe kebek keber keble keele keere kegel keget kelek kelle kerek kerel keret kergu kerle kerre kertu ketek ketel keter kette kleet klerk klett kluge kluke klute kreek kreel kreke krele krell krete kreuk kruge krull kubek kuber kubul kugel kugur kukel kukle kukur kullu kulte kulul kulur kurbu kurek kurku kurlu kurre kurte kuruk kutlu kutte kuttu kutur lebel leber lebet leeke leell leere leert leger legge lekel lekeu leleu lelle lerer lerge letbe letek letre lette letur leuge leuk- leuke llerg lubbe luber lubke luble lubur luger lugge lugre luker luket lukre lukut lulle lulte lulul lurer lurgg lurue lute- lutek luter lutke lutte rebbe rebeg rebel reber rebet rebut reege reere regel reger reget regge regle regtl regtt regul regur regut rekel rekke rekle relee relek relet relte relue rere- reree reret retee retel reter retrg rette reuel reuer reuet reule reute rt-rk rubee rubel ruber rubke ruble ruegg ruele ruell ruere ruete ruger ruget rugge rukel rukke ruler ruter rutle rutte rutul ruule ruutu tbtbt tbutt teber tebet tebuk teege teele teell tegel tegre tegur tekel teket tekke tele- teleg telek teler teleu tell- telle teluk terek teret tereu terge tergu terre tert- tetel teter tetle tetr- tette teuge tlell tlett tllbr trbuk treer treet treg- trele trere trete trett treut trubu truel truer trugg truke trule trull trute ttttt tubek tuber tubul tuell tuelt tukul tukur tulet tulku tulle turbe turbt turek turel turet turku turle turre turtu turul turut tutee tutel tutku tutle tutte tuuru ubble uber- uggle ugluk ugrug ukeke ukert ukuug ulger ulker ullet ullur ultre ululu uluru urelu urgel urger urgut urkel urker urkut urtel urter urtlu urubu urutu uter- utter uttur utube uturu uuuuu