dddd ddre dedd dede dedu deed deer deet der- dere derr dete detr deue deur deut deux dex- dexe dext dred dree dret drue drut druu dted dttx dtxt dudd dude dudu duer duet dure durt duru dute duur duut dxdr dxed dxrd dxre dxrr dxrt dxrx dxue dxur dxxr dxxx edde ede- eder edex edru edur eede eedu eeee eete eetu eext er-x erde ered erer eret erre ertu erur etee eter etre ette ettu etux eude euer eur- eure eurt exed exer exrx exte extr rder redd rede redr redu redx reed reet rerd rere rert reru retd rete retr rett reue reut reuu reux rexx rred rrrr rtdt rtee rtex rudd rude rued ruer ruet rurd rure ruru rute rutt rutu ruud tedd tede tedx teed teer teet ter- tere terr teru tete tetr tett tetu tetx teut text tre- tred tree tret treu trex trte trtr trud true trut truu trux tter tttt tude tudu tuer tuet turd ture turr turt turu tute tutt tutu txtr uder udet uext urde urdu ure- ured uret urex urre urte urur urut uter uttu uuuu uxue x-ed xeer xer- xert xexe xuxu xxxx