-tree b-e-d bbbee bd-re be-er bebed beber bedde bedee beder bedet beebe beede beerd beete beeve berbe berde bered beret berre berte betee beter betre bett- bette bever bredd brede bredt breed breer breet brerd brere brett breve brrrr btr-d btr-t d-rev ddddd debed deber debet debte dedde dedee deder deede deere deeve derbe derde dered derre derve deter detre dette dever devet drdre dredd drede dreed drere dreve dvb-t dvd-d dvd-r e-dee ebbed ebber ebbet ebert edder eddre edere edred eeeee eerde eevee eever erbbe erber erdre erede erere ereve erred erte erter etete etree etter evdev evere everr evert evete evett eveve rebbe reber rebet redbd redde reder reede reere reeve rerde rere- reree reret reted retee reter rette rever revet rtrev tbtbt teber tebet teder teerd teret terre tert- terve teter tetr- tette tevet treed treer treet trere trete trett treve ttttt veber vebre vedde veder veede veere veeve verd- verde vereb vered verre verte verve vette vever vrede