tvtv ubbe ubbo uber ubet ugeo uggo uggt ugro ugur uguu uor- uore uovo urbe ure- uret urge urgu uro- uroo urre urte urur urut urve uter utor utto uttu utug uuuu uv-b uver uvvu vbrg veer veet vege veor ver- verb vere vero vert vete veto vetr veur veve vevo voer voet voeu voge vogt vogu voog voor voot vor- vore voro vort voru vote voto voue vour vout vreo vret vrot vrto vugg vugo vurb vurg vurt vutv vver vvob vvog vvvv

-tree bbbee be-er be-ro beber bebog bebot beebe beete beeut beeve 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 beuve bever bevor bevue bo-bo bobet bobov 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 borov borre borro borut borve borvo botet botev botou botro botte bottu bouee bouer bouet bouge boure bourg boute bouto bovee brebu breer breet breg- brege bregg breo- brere breto brett breu- breve brobo broer broto broue brout brrrr bruer bruet bruge brugg brute btr-t bubbe buber buger bugge bugoo bugre buret burge burgo burgu buroo burov burro burru burte burtt burut buteo buter buto- butor butot butou butov butte butuo butut ebber ebbet eberg ebert eboue ebure eeeee eevee eever egger egret eorre erbbe erber erege erere ereve ergo- ergot eroge eroor erore eroto error errtu erte erter ertug erugo etete etoro etour etree etrog etter eturu eubro euro- eurre evere everg evero everr evert evete evett eveve evoor evote evour gberg gberu geber gebet gebre gebur geebo geere geert geete gegge georg gerbe gerbo gerov gerre gertt gerve getee geter getgo getov gette getto gettv gever go-go go-oo go-to gobbe gobbo gobeo gobet gobot goget gogro gogue goobo googe goore goote goout gorbe goree gorer gorev gorge gorgo gorre goter gotoo gotor gotto gotur gouet gouge goure gouv- gover grebe grebo greer greet grege gregg grego greot grete grett greut greve grevo grgur groet groge grogg groot grote grott groue grout grove grrrr grubb grube grure gruut gruve gtrot gtube gubbe gubbo guber gubru guere guero guoge gurge guroo gurov gurre gurro gurur gutte o-r-b obbet obegu oberg obert obete oboro obote oboue obout obreb obrov ogogo ogugu oo-er ooooo oovoo orbot oreo- orere orero orgov orgue orobe orobo oroer orout orret orrgo orter ortet ortoo orube oruro orutu orvet otego otere otero ototo otour otrov otter ottov ottur oture oubut ouert ouoro oure- outer outgo outre outro outto outtv ouver ouvre over- overo overt ovett rebbe rebeg reber rebet rebut reege reere reeve reger reget regev regge reggo regtt regur regut reorg rere- reree reret rerob retee reter retgo retrg retro rette retto reuer reuet reute rever revet revue ro-ro robbe robbo rober robo- robor robot robrt robte robur roero roger roget rogge rogov rogue rooer rooge roore roote rooue roove rorbu rorer roteb roter rotge roto- rotor rotot rotte rotto roubt rouer rouet rouge roure route routt rover rtrev rttov 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 terve tervo teter tetov tetr- tetro tette teuge teuto teuvo tevet tevot 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 torve toter toto- totoe totoo totte tougu toure touro toute tover tovet treer treet treg- trego trere trete trett treut treve troee trott troue trout trove trovo trubu truer trugg trugo truro trute trutv truvo ttttt tuber tubo- tubog tubou tuero tugou tuotu turbe turbo turbt turet turgo turot turov turre turro turtu turut turve turvo 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 uvrou v-bob v-bor veber vebre veere veeve veget veggo vegre verbo vereb verge vergo vergt verot verre verte vertu verve vette vetto veuve veveo vever voere vogue voobu voore vooru vorbe vorre vorte voter votre votto vouge voure voute vrbov vuere vurot vutov vuver

b-tree bbbbbb bebeto bebout bebove beebee beebug beegee beeter beever beevor begger begogo begore begoro berbee berbeo berber bereet berege berere berevo berger berour berovo berrer berret bertre berube betere betete betrue bettee better bettor betutu beugro beurre bevoor bobber boberg bobete bobote bobovo bobrov boeber boegoe boerge boerre bogert bogeve bogger bogore bogoro bogote bogove boober booboo booger booget bootee booter booue borbor boreto borger borgue borogo borore bororo borovo borte botere botero botete botevo botoro botovo botree botter boture boubou boueer bougee bouget bougou bougre bougue bouree bourou bourre bouter boutet boutob boutre boutte bouvet bovert bovver breege breere bregbo breger bregge brette bretuo breuer brever brevet brogue broter brotto brouet broute brubru brugge bruree brutto bubber bububu bugbug bugger bugget bugout burbet burbot burbur burgee burgeo burger burgoo burgor burotu burovo burree burrer burret burutu butbro butere butovo butter buttto buutuo ebbert ebbout eburru eebree egbere egbert eggert egoboo egrote eototo erbree eroto- errett errour etgert etoeot ettore ettutu euroto eururo eutere euttob everte evoure g-tube gbegbe gbeogo gebbet gebert geegee geegot gegger george gerber gerege gereut gerger gerovo gerret gertte geruge get-go getout getter gevorg go-out gobbet gobbur gobero gobert gobett goeuro gogbot gogoro goober googoo goorge gooroo gootee goover gorbet gorger gorget gorgor gorter gotebo gotere gotour gotout gotter gouber gougee gouger gougre gourge gourou goutte govote greebo greete greeve greger gregge gregor gregre greote greter grette gretto grobbe groeve grogge grogue groote groove grotte grotto grouue grover grovet grubbe gruber gruevo grugru gruver gteter gubber gubeer gubgub gueber guebre guegue guerou guerre guetre gurbru gurugu guruve gutrot guttee gutter