errc erre erro ertu erub eruc erur etbc etbr etcc etco etec etee eter etoe etre etro ette etto ettu eubc eucd eude euer eur- eurc eure euro eurt o-eo obbo obdt obec obed ober obet oboe obor obot obre obro obtd ocbc occc occt oce oced ocee ocet ocre ocro ocrr oct- octe octo ocur odbo oddd oded odeo oder odet odoo odor odot odou odtu odur oec- oecc oedo oeec oere oobe oocr ooer oooo oord oore oort ootb orbb orbe orbo orbu orce orco orde ordo ordu ore- oreb orec ored oreo orer oro- oroe oror orot orro ortc orte orto orub otbd otcd oted otee oter oto- otoe otoo otor otre otro otte otto ottu otur oucc oudc oude oued ouer our- oure ouro ourt out- outb oute outo ouu- rbbb rbbr rcbc rcbo rccb rccc rcdc rcde rcet rcrd rctc rder rdoc rebb rebe rebo rebu recc recd rece recr rect recu redc redd rede redo redr redu reeb reed reet reod reot reou rerd rere rero rert reru retd rete reto retr rett reue reut reuu rob- robb robe robo robt robu rocc roce roco rodd rode rodo roed roer roet roob rood roor root rorc rore roro rort roru rotc rote roto rotr rott roub roud roue rout rred rrrr rtcc rtce rtdt rtee rubb rube rubu ruce ruct rudd rude rudo rued ruer ruet rurc rurd rure ruro ruru rute ruto rutt rutu ruud tbcb tbcc tbcd tbce tbrb tccc tccu tcdd tctc tddb tdor tebo tebu teco tecr tect tedd tede teec teed teer teet teor ter- terc tere tero terr teru tete teto tetr tett tetu teut tobe tobo tobt tobu toce toco todd tode todo todt todu toed toee toer toet tood toor toot torc tord tore toro torr tort toru totc totd tote toto totr tott tour tout trcc tre- trec tred tree treo tret treu troc trod troe troo trot trou trtc trte trtr trub truc trud true trut truu ttbb tteo tter ttoe tttt tubb tube tubo tubr tubu tucc tuco tude tudu tuer tuet tuor turb turc turd ture turo turr turt turu tute tuto tutt tutu tuuo ubbe ubbo uber ubet uboc ubod ubud ucbc ucdc ucdd ucrc ucut udbc uder udet udoo udot uocc uor- uore urbe urde urdu ure- ured uret uro- uroo urre urte urur urut utec uter utor utto uttu uuoc uuuu

-tree b-e-d bbbee bcced bcode bd-re bdoor bdort be-er be-ro bebdo bebed beber bebod bebot becco becue becut bedde bedee beder bedet bedot bedub bedue beebe beede beerd beete beeut beode beord beote beour berbe bercu berde berdu berec bered beret berob beroe beror berre berru berte berto betee beter betoo betor betou betre bett- bette betto beuer beure beute bo-bo bobet boboc bobr bobre bocce bocet bocor bodd- boded boder bodoc bodoe bodor boece boedo boero boeur booce booco boode booed booer boord boore boort booru borbo borce borde bordo borec bored boree borer boret boro- borod boroo borot borou borre borro borut botet botou botro botte bottu bouce boudu boued bouee bouer bouet bourd boure boute bouto brebu brece bredd brede bredt breed breer breet breo- breoc brerd brere breto brett breu- brobo broce brodd brode brodo broer brood broto broud broue brout brrrr bruce brud- brude brued bruer bruet brute btc-e btr-d btr-t bubbe buber bucco buceo bucet bucur budde buddu budec budoc budur buord burcu burde buret buroo burro burru burte burtt buruc burud burut butdo butec buteo buter buto- butor butot butou butte butuo butut c-cor c-dot c-tec ccccc ccett cduce cebec ceber ceco- ceddo ceded ceder cedor cedr- cedre cedro ceede ceedo ceere ceoce ceoor cerbu cerc- cerce cerco cerdo cerec cered cerer ceret cero- ceroc cerou cerre cerro certe ceto- cette co-bo co-co co-ed cobbe cobot cobre cobue cocc- cocce cocco coceo cocto cocur codco codde codec coded coder codo codru coete coeur coode cooed cooee cooer coord coore coote corbe corbo corbu corce corde core- cored coree corer coreu coro- corod corot corre corte corto coted coter cott- cotte cotto cottu couco coude couer courb courd coure court couru couto coutu crebe crece crede credo creed creer creo- creot crete cretu creu- creue croce croco crode crodo crood crooe croot crore crote crott croud crout cruce crude crudo cruet cruor crure ctree cttee cubbe cubeb cubed cuber cubo- cubot cubub cudde cudot cuero cueto cuoco cuore curce cured curer curet curre curro curto cutco cutcu cutee cuter cutro cutto d-cru d-dot d-rod dcore ddddd ddebo debce debed deber debet debot debrc debro debte debut decet decor decur dedde dedee deder dedur dedut deece deede deere deore deoro derbe derce derde dered dero- derob derre derro derub derue deter detoo detre dette detuo detur deuce deure deut- deuto do-do dobec dobee dober dobre dobro doced docer docet dodec dodoo dodro doerr dooce doodo doore doote doout dorce dordt dored doree doret dorot dorre dorte dorud doted doter dotoo dotto doubt douce doude douer doure douro doute drbob drdre dredd drede dreed drere drobe drobo drode drood drote drott droue drout druce drude dtour dubbo dubec dubee dubuc ducor duddo duded duder dudou duduc duere duerr duete dueto duett durbe dured duree durer duret duroc durre durte durtu dutte e-dee e-otd ebbed ebber ebbet ebert eboue ebure ecord ecto- ector ectot edder eddoe eddre edeo- edere edocr edoor edott edred educe educo educt eeeee eerde eorre erbbe erber erdec erdoc erdor erdre erdut erect erede erere erode erodr eroor erore eroto erred error errtu erte erter eruct etete etoro etour etree etter etude eturu eubro eucre euro- eurre o-r-b obbet obedt obert obete obodo oboro obote oboue obout obreb obudu occur ocoee ocote ocr-b ocree octet octo- octor odder oddur odebo odeco odeto odeur odore odour odudu odure oduro oeco- oo-er oocre ooooo orbec orbed orbot orcet order ordet ordoc ordre ordro orduc oreco oredo oreed oreo- orere orero orobe orobo oroco orodo oroer orout orret orter ortet ortoo orube oruce oruro