herry ehrry hrery rhery erhry rehry herry ehrry hrery rhery erhry rehry hrrey rhrey hrrey rhrey rrhey rrhey errhy rerhy errhy rerhy rrehy rrehy heryr ehryr hreyr rheyr erhyr rehyr heyrr ehyrr hyerr yherr eyhrr yehrr hryer rhyer hyrer yhrer ryher yrher eryhr reyhr eyrhr yerhr ryehr yrehr heryr ehryr hreyr rheyr erhyr rehyr heyrr ehyrr hyerr yherr eyhrr yehrr hryer rhyer hyrer yhrer ryher yrher eryhr reyhr eyrhr yerhr ryehr yrehr hrrye rhrye hrrye rhrye rrhye rrhye hryre rhyre hyrre yhrre ryhre yrhre hryre rhyre hyrre yhrre ryhre yrhre rryhe rryhe ryrhe yrrhe ryrhe yrrhe erryh reryh erryh reryh rreyh rreyh eryrh reyrh eyrrh yerrh ryerh yrerh eryrh reyrh eyrrh yerrh ryerh yrerh rryeh rryeh ryreh yrreh ryreh yrreh
Note: these 'words' (valid or invalid) are all the permutations of the word herry. These words are obtained by scrambling the letters in herry.