-tree b-e-d bbbee bd-re be-er bebed beber bedde bedee beder bedet bedew bedub bedue beebe beede beerd beete beeut berbe berde berdu bered beret berre berru berte berwe betee beter betre bett- bette beuer beure beute bewed bewer bewet bewte brebu bredd brede bredt breed breer breet brerd brere brett breu- brewe brrrr brud- brude brued bruer bruet brute btr-d btr-t bubbe buber budde buddu budur burde buret burru burte burtt burud burut burwe buter butte butut ddddd debed deber debet debte debut dedde dedee deder dedur dedut deede deere derbe derde dered derre derub derue deter detre dette detur deure deut- dewed dewer dewet dewre drdre dredd drede dreed drere drewe drewu drude dubee duded duder duere duerr duete duett durbe dured duree durer duret durre durte durtu durwe dutte dweeb dwere dwete e-dee ebbed ebber ebbet ebert ebure edder eddre edere edred eeeee eerde erbbe erber erdre erdut erede erere erewe erred errew errtu erte erter etete etree etter etude eturu etwee eurre ewder ewedu ewert rebbe reber rebet rebud rebut redbd redde reder redub redur reede reere reewe rerde rere- reree reret reted retee reter retew rette reuer reuet reute reuwe rewde rewed rewer rewet rewrd rubee ruber ruder ruede ruere ruete rurde ruter rutte ruutu ruwer ruwet tbtbt tbutt teber tebet teder teerd teret tereu terre tert- teter tetr- tette tewed tewer tewet treed treer treet trere trete trett treut trewe trubu trude trued truer trute truwe ttttt tubed tuber tuder tudre tudur turbe turbt turet turew turre turtu turut tutee tutte tuuru twedt tweed tweer tweet twere u-dub uber- udder udert urdee urewe urter urubu urutu uter- utrdb utter uttur utube uturu uuuuu webbe weber webwe wedde weder wedeu wedre wedue wedwe weede weerd weere weert weete werbe werde were- wered werew werre werte wertu werur weter wette weurt wrede wrete wrett wrutt wurde wwwww