eeee eero eete eetu eext eore eoto eoux er-x erer eret eroe eroo erre erro ertu erur etee eter etoe etox etre etro ette etto ettu etux euer eur- eure euro eurt exer exo- exor exrx exte extr o-eo oere ooer oooo oore oort ore- oreo orer orex oro- oroe oror orot orro orte orto otee oter oto- otoe otoo otor otre otro otte otto ottu otur ouer our- oure ouro ourt out- oute outo ouu- oxer oxo- oxox oxxo reet reot reou rere rero rert reru rete reto retr rett reue reut reuu reux rexx roer roet roor root roox rore roro rort roru rote roto rotr rott roue rout roux roxo rrrr rtee rtex ruer ruet rure ruro ruru rute ruto rutt rutu teer teet teor ter- tere tero terr teru tete teto tetr tett tetu tetx teut text toee toer toet toor toot tore toro torr tort toru torx tote toto totr tott tour tout tox- toxo toxt tre- tree treo tret treu trex troe troo trot trou trox trte trtr true trut truu trux tteo tter ttoe tttt tuer tuet tuor ture turo turr turt turu tute tuto tutt tutu tuuo txtr uext uor- uore ure- uret urex uro- uroo urox urre urte urur urut uter utor utto uttu uuuu uxor uxue xeer xer- xero xert xexe xoro xote xout xoxo xtro xuxu xxxo xxxx