hrote rhote horte ohrte rohte orhte hrtoe rhtoe htroe throe rthoe trhoe hotre ohtre htore thore othre tohre rothe orthe rtohe trohe otrhe torhe hroet rhoet horet ohret rohet orhet hreot rheot herot ehrot rehot erhot hoert ohert heort ehort oehrt eohrt roeht oreht reoht eroht oerht eorht hrteo rhteo htreo threo rtheo trheo hreto rheto herto ehrto rehto erhto htero thero hetro ehtro tehro ethro rteho treho retho ertho terho etrho hoter ohter htoer thoer other toher hoetr ohetr heotr ehotr oehtr eohtr hteor theor hetor ehtor tehor ethor otehr toehr oethr eothr teohr etohr roteh orteh rtoeh troeh otreh toreh roeth oreth reoth eroth oerth eorth rteoh treoh retoh ertoh teroh etroh oterh toerh oetrh eotrh teorh etorh
Note: these 'words' (valid or invalid) are all the permutations of the word hrote. These words are obtained by scrambling the letters in hrote.