b-e-d bbbee bd-re be-er bebed beber bedde bedee beder bedub bedue beebe beede beerd berbe berde berdu bered berre berru beuer beure bre-x brebu bredd brede breed breer brerd brere breu- breux brrrr brud- brude brued bruer bubbe buber budde buddu budur burde burru burud ddddd debed deber dedde dedee deder dedur deede deere derbe derde dered derre derub derue deure drdre dredd drede dreed drere dreux drude dubee duded duder duere duerr durbe dured duree durer durex durre dxdxd e-dee ebbed ebber ebure edder eddre edere edred eeeee eerde erbbe erber erdre erede erere erred eurex eurre exede exred exude exurb rebbe reber rebud redbd redde reder redex redub redur redux reede reere rerde rere- reree reuer rexer rubee ruber ruder ruede ruere rurde u-dub uber- uberx udder urbex urdee urubu uuuuu xbxrx xedre xexeu xexex