eeee eero eete eeth eext eheh eher ehre ehte eore eoto er-x erer eret eroe eroo erre erro erth etee eter eth- ethe etho etoe etoh etox etre etro ette etto exer exh- exo- exor exrx exte extr heer heet hehe heho heor here hero herr hert hete heth heto hett hex- hexe hext hhex hhhh hoer hohe hoho hooe hoor hoot hoox hore horo horr hort hote hoth hoto hotr hott hree hrte htet htoh httr o-eo oere ohee oher ohho ohoh ohre ohte ohto ooer ooho oooh oooo oore oort ore- oreh oreo orer orex orhe oro- oroe oror orot orro orte orth orto otee oter othe otho othr oto- otoe otoh otoo otor otre otro otte otto oxer oxo- oxox oxxo reet rehe reht reot rere rero rert rete reth reto retr rett rexx rhee rheo rhet rhex rhoh roer roet rohe rohr roor root roox rore roro rort rote roth roto rotr rott roxo rrrr rtee rtex teer teet teho tehr teoh teor ter- tere tero terr tete teth teto tetr tett tetx text the- thee theo ther thet thex thoe thoo thor thot thre thro thtr toee toeh toer toet toho tooh toor toot tore toro torr tort torx tote toth toto totr tott tox- toxo toxt tre- tree treo tret trex troe troo trot trox trte trtr tteo tter ttoe tttt txtr xeer xer- xero xert xexe xoro xote xoth xoxo xtro xxxo xxxx