-tree bbbee be-er be-ro beber bebog bebot beebe beete beeut begee beget begge begob begor begot begto begue begur begut beote beour berbe bereg beret berge berob beroe beror berre berru berte berto betee beter betoo betor betou betre bett- bette betto beuer beure beute bo-bo bobet bobr bobre boege boero boeur boger boget bogge bogoe bogor bogot bogu bogue bogur bogut booer boore boort booru borbo boree borer boret borge borgo borgu boro- boroo borot borou borre borro borut botet botou botro botte bottu bouee bouer bouet bouge boure bourg boute bouto brebu breer breet breg- brege bregg breo- brere breto brett breu- brobo broer broto broue brout brrrr bruer bruet bruge brugg brute btr-t bubbe buber buger bugge bugoo bugre buret burge burgo burgu buroo burro burru burte burtt burut buteo buter buto- butor butot butou butte butuo butut ebber ebbet eberg ebert eboue ebure eeeee egger egret eorre erbbe erber erege erere ergo- ergot eroge eroor erore eroto error errtu erte erter ertug erugo etete etoro etour etree etrog etter eturu eubro euro- eurre gberg gberu geber gebet gebre gebur geebo geere geert geete gegge georg gerbe gerbo gerre gertt getee geter getgo gette getto go-go go-oo go-to gobbe gobbo gobeo gobet gobot goget gogro gogue goobo googe goore goote goout gorbe goree gorer gorge gorgo gorre goter gotoo gotor gotto gotur gouet gouge goure grebe grebo greer greet grege gregg grego greot grete grett greut grgur groet groge grogg groot grote grott groue grout grrrr grubb grube grure gruut gtrot gtube gubbe gubbo guber gubru guere guero guoge gurge guroo gurre gurro gurur gutte o-r-b obbet obegu oberg obert obete oboro obote oboue obout obreb ogogo ogugu oo-er ooooo orbot oreo- orere orero orgue orobe orobo oroer orout orret orrgo orter ortet ortoo orube oruro orutu otego otere otero ototo otour otter ottur oture oubut ouert ouoro oure- outer outgo outre outro outto rebbe rebeg reber rebet rebut reege reere reger reget regge reggo regtt regur regut reorg rere- reree reret rerob retee reter retgo retrg retro rette retto reuer reuet reute ro-ro robbe robbo rober robo- robor robot robrt robte robur roero roger roget rogge rogue rooer rooge roore roote rooue rorbu rorer roteb roter rotge roto- rotor rotot rotte rotto roubt rouer rouet rouge roure route routt rubee ruber rubor ruegg ruere ruete ruger ruget rugge ruter rutog rutte ruutu tbtbt tbutt teber tebet teege tegre tegur teret tereu terge tergo tergu teror terre terro tert- teruo teter tetr- tetro tette teuge teuto to-be to-go tobbe tobeg tober tobet tobog tobor tobot tobou tobre toego toerr toeto toget togge togou togue toobe toore torbe toreo toret torgo torob torog torre torro torte torto tortu torue toter toto- totoe totoo totte tougu toure touro toute treer treet treg- trego trere trete trett treut troee trott troue trout trubu truer trugg trugo truro trute ttttt tuber tubo- tubog tubou tuero tugou tuotu turbe turbo turbt turet turgo turot turre turro turtu turut tutee tuteo tutor tutte tutto tuuru uber- ubobo ugro- ugrug uouee ureo- urger urgut uroob urour urter urubu urutu utebo uter- utero utro- utror utter uttur utube uturu ututo uuuuu