dddd ddot ddre dedd dede dedo dedu deed deer deet deor der- dere dero derr dete deto detr deue deur deut dod- dodd dode dodo doer dood door doot dord dore doro dorr dort doru dotd dote doto dott doud doue dour dout dred dree dret drod drot drou drue drut druu dted dtor dtot dudd dude dudo dudu duer duet duo- dure duro durt duru dute duur duut edde eddo ede- eder edod edou edru edur eede eedu eeee eero eete eetu eode eore eotd eoto erde ered erer eret erod eroe eroo erre erro ertu erur etee eter etoe etre etro ette etto ettu eude euer eur- eure euro eurt o-eo oddd oded odeo oder odet odoo odor odot odou odtu odur oedo oere ooer oooo oord oore oort orde ordo ordu ore- ored oreo orer oro- oroe oror orot orro orte orto oted otee oter oto- otoe otoo otor otre otro otte otto ottu otur oude oued ouer our- oure ouro ourt out- oute outo ouu- rder redd rede redo redr redu reed reet reod reot reou rerd rere rero rert reru retd rete reto retr rett reue reut reuu rodd rode rodo roed roer roet rood roor root rore roro rort roru rote roto rotr rott roud roue rout rred rrrr rtdt rtee rudd rude rudo rued ruer ruet rurd rure ruro ruru rute ruto rutt rutu ruud tdor tedd tede teed teer teet teor ter- tere tero terr teru tete teto tetr tett tetu teut todd tode todo todt todu toed toee toer toet tood toor toot tord tore toro torr tort toru totd tote toto totr tott tour tout tre- tred tree treo tret treu trod troe troo trot trou trte trtr trud true trut truu tteo tter ttoe tttt tude tudu tuer tuet tuor turd ture turo turr turt turu tute tuto tutt tutu tuuo uder udet udoo udot uor- uore urde urdu ure- ured uret uro- uroo urre urte urur urut uter utor utto uttu uuuu