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