rute ruto rutt rutu ruve ruvu rv-c rver tbcb tbcc tbce tbrb tccc tccu tcov tctc tebo tebu teco tecr tect teec teer teet teev teor ter- terc tere tero terr teru tete teto tetr tett tetu teut tobe tobo tobt tobu toce toco toee toer toet toor toot torc tore toro torr tort toru torv totc tote toto totr tott tour tout touv tove tovo trcc tre- trec tree treo tret treu trev troc troe troo trot trou trtc trte trtr trub truc true trut truu ttbb tteo tter ttoe tttt tubb tube tubo tubr tubu tucc tuco tuer tuet tuor turb turc ture turo turr turt turu tute tuto tutt tutu tuuo tver tvro tvrr tvtv ubbe ubbo uber ubet uboc ucbc ucrc uctv ucut uocc uor- uore uovo urbe ure- uret uro- uroo urre urte urur urut urve utec uter utor utto uttu uuoc uuuu uv-b uv-c uver uvvu vbcc vecc veer veet veor ver- verb vere vero vert vete veto vetr veur veve vevo voce voer voet voeu vooc voor voot vor- vore voro vort voru vote voto voue vour vout vreo vret vroc vrot vrto vtec vuco vurb vurt vutv vver vvob vvvv

-tree bbbee bbctv be-er be-ro beber bebot becco becov becue becut beebe beete beeut beeve beote beour berbe bercu berec beret berob beroe beror berre berru berte berto betee beter betoo betor betou betre bett- bette betto beuer beure beute beuve bevce bever bevor bevue bo-bo bobet boboc bobov bobr bobre bocce bocet bocor boece boero boeur booce booco booer boore boort booru borbo borce borec boree borer boret boro- boroo borot borou borov borre borro borut borve borvo botet botev botou botro botte bottu bouce bouee bouer bouet boure boute bouto bovec bovee brebu brece breer breet breo- breoc brere breto brett breu- breve brobo broce broer broto broue brout brrrr bruce bruer bruet brute btc-e btr-t bubbe buber bucco buceo bucet bucov bucur burcu buret buroo burov burro burru burte burtt buruc burut butec buteo buter buto- butor butot butou butov butte butuo butut buvce c-cor c-evo c-tec ccccc ccctv ccett cebec ceber ceco- ceere ceoce ceoor cerbu cerc- cerce cerco cerec cerer ceret cero- ceroc cerou cerre cerro certe cervo ceto- cette co-bo co-co cobbe cobot cobre cobue cocc- cocce cocco coceo cocto cocur coete coeur coeve cooee cooer coore coote corbe corbo corbu corce core- coree corer coreu coro- corot corre corte corto cortv corve corvo coter cott- cotte cotto cottu couco couer courb coure court couru couto coutu couve coveo cover covet crebe crece creer creo- creot crete cretu creu- creue creve croce croco crooe croot crore crote crott crout crove cruce cruet cruor crure cruve ctree cttee cubbe cubeb cuber cubo- cubot cubub cuero cueto cuevo cuoco cuore curce curer curet curre curro curto curve cutco cutcu cutee cuter cutov cutro cutto cuvee cvrce ebber ebbet ebert eboue ebure ecorv ecto- ector ectot eeeee eevee eever eorre erbbe erber erect erere ereve eroor erore eroto error errtu erte erter eruct etete etoro etour etree etter eturu eubro eucre euro- eurre evere evero everr evert evete evett eveve evocb evoor evote evour o-r-b obbet obcov obert obete oboro obote oboue obout obreb obrov occur ocoee ocote ocr-b ocree octet octo- octor oeco- oo-er oocre ooooo oovoo orbec orbot orcet oreco oreo- orere orero orobe orobo oroco oroer orout orret orter ortet ortoo orube oruce oruro orutu orvet otcbb otere otero otoce ototo otour otrov otter ottov ottur oture oubut ouert ouoro ource oure- outer outre outro outto outtv ouver ouvre oveco over- overo overt ovett r-co- rebbe rebec reber rebet rebut recce recco recet rect- recte recto recue recur recut reece reere reeve rere- reree reret rerob retee reter retro rette retto reuer reuet reute revco rever revet revue ro-ro robbe robbo robec rober robo- robor robot robrt robte robur rocco rocor rocou rocov roero rooer roore roote rooue roove rorbu rorer roteb roter roto- rotor rotot rotte rotto roubt rouer rouet roure route routt rover rtrev rttov rubee ruber rubor rucer ruere ruete rurec ruter rutte ruutu tbtbt tbutt tcobb teber tebet tecou tectb teoco terce terco teret tereu teror terre terro tert- teruo terve tervo teter tetov tetr- tetro tette teuto teuvo tevet tevot to-be tobbe tober tobet tobor tobot tobou tobre tocco toco- tocut toece toerr toeto toobe toore torbe torce toreo toret torob torre torro torte torto tortu torue torve toter toto- totoe totoo totte toure touro toute tover tovet trboc treco treer treet trere trete trett treut treve troco troee trott troue trout trove trovo trubu truce truco truer truro trute trutv truvo ttttt tuber tubo- tubou tucet tuctu tuero tuotu turbe turbo turbt turco turet turoc turot turov turre turro turtu turut turve turvo tutee tuteo tutor tutte tutto tuuru tvvcr u-cee uber- ubobo ucero uouee ureo- uroob urour urter urubu uruce urucu urutu utebo uter- utero utro- utror utter uttur utube uturu ututo uuuuu uvrou v-bob v-bor veber vebre vecer vecov veeco veere veeve verbo verco vereb verot verre verte vertu verve vetco vette vetto veuve vevce veveo vever voere voobu voore vooru vorbe vorce vorre vorte voter votre votto voure voute vrbov vuere vurot vutov vuver

b-tree bbbbbb bebeto bebout bebove becure beebee beeter beever beevor berbee berbeo berber berceo bereet berere berevo berour berovo berrer berret bertre berube betere betete betrue bettee better bettor betutu beurre bevoor bobber bobcut bobete bobote bobovo bobrov boccob boeber boerre boober booboo bootee booter booue borbor boreto borore bororo borovo borte botere botero botete botevo botoro botovo botree botter boture boubou boueer bouree bourou bourre bouter boutet boutob boutre boutte bouvet bovert bovver breere bretcu brette bretuo breuer brever brevet brocco brocor brocot broter brotto brouet broute brubru bruree brutto bubber bububu bucco- burbet burbot burbur burcer burcot burotu burovo burree burrer burret burutu butbro butere butovo butter buttto butucu buutuo c-cube ceecee cerco- cerete cerote cerove cerovo certco ceruce cetore cobber cobbob cocco- cococo cocto- coerce coeuve coo-er coocoo cooter corbet