dddd ddot ddre dedd dede dedo deed deef deer deet defe deff defo deft deor der- dere derf dero derr dete deto detr dex- dexe dext dfdt dfer dfoe dfrf dftr do-x dod- dodd dode dodo doer doff dood doof door doot dord dore dorf doro dorr dort dotd dote doto dott dred dree dref dret drod drof drot dted dtor dtot dtox dttx dtxt dxdr dxed dxef dxfe dxfx dxrd dxre dxrf dxrr dxrt dxrx dxxr dxxx edde eddo ede- eder edex edod eede eeee eefe eero eete eext efeo efet efor eft- eode eore eotd eoto er-x erde erdf ered erer eret erft erfx erod eroe eroo erre erro etee eter etfe etoe etox etre etro ette etto exed exer exfo exo- exod exor exrx exte extr fdot fede feed feer feet fefe feff fefo feod feof ferd fere fero ferr fert fete fetr fett fext ffee ffff ffrr fftf fode foed foer fofo food foof foot for- ford fore foro forr fort fote foto fott foxe foxx fred free freo fret frex froe frot fter fxdd o-eo oddd oded odeo oder odet odex odoo odor odot oedo oere ofdr ofer off- offe offo offr ofor ofre ooer ooff oooo oord oore oort orde ordo ore- ored oreo orer orex orfe orff oro- oroe orof oror orot orro orte orto oted otee oter oto- otoe otof otoo otor otre otro otte otto oxer oxo- oxof oxox oxxo rder redd rede redo redr redx reed reef reet refd refe reff refr reft reod reof reot rerd rere rero rert retd rete reto retr rett rexx rfef rodd rode rodo roed roer roet rofe roff rofo rood roof roor root roox rore roro rort rote roto rotr rott roxo rred rrrr rtdt rtee rtex tdff tdor tedd tede tedx teed teef teer teet teff teft teor ter- tere terf tero terr tete teto tetr tett tetx text tfot tfox todd tode todo todt toed toee toer toet toff tofo toft tood toof toor toot tord tore torf toro torr tort torx totd tote toto totr tott tox- toxo toxt tre- tred tree tref treo tret trex trfd trfr trod troe troo trot trox trte trtr tteo tter ttff ttoe tttt txtr x-ed xdxf xeer xefe xer- xero xert xexe xfer xoro xote xoxo xrod xtro xxxo xxxx