hurts uhrts hruts rhuts urhts ruhts hutrs uhtrs hturs thurs uthrs tuhrs hrtus rhtus htrus thrus rthus trhus urths ruths utrhs turhs rtuhs truhs hurst uhrst hrust rhust urhst ruhst husrt uhsrt hsurt shurt ushrt suhrt hrsut rhsut hsrut shrut rshut srhut ursht rusht usrht surht rsuht sruht hutsr uhtsr htusr thusr uthsr tuhsr hustr uhstr hsutr shutr ushtr suhtr htsur thsur hstur shtur tshur sthur utshr tushr usthr suthr tsuhr stuhr hrtsu rhtsu htrsu thrsu rthsu trhsu hrstu rhstu hsrtu shrtu rshtu srhtu htsru thsru hstru shtru tshru sthru rtshu trshu rsthu srthu tsrhu strhu urtsh rutsh utrsh tursh rtush trush ursth rusth usrth surth rsuth sruth utsrh tusrh ustrh sutrh tsurh sturh rtsuh trsuh rstuh srtuh tsruh struh
Note: these 'words' (valid or invalid) are all the permutations of the word hurts. These words are obtained by scrambling the letters in hurts.