erses reses esres seres rsees srees eress reess eerss eerss reess eress esers seers eesrs eesrs seers esers rsees srees reses erses seres esres ersse resse esrse serse rsese srese ersse resse esrse serse rsese srese essre sesre essre sesre ssere ssere rssee srsee rssee srsee ssree ssree eress reess eerss eerss reess eress erses reses esres seres rsees srees eesrs eesrs esers seers esers seers reses erses rsees srees esres seres esesr seesr eessr eessr seesr esesr esser seser esser seser sseer sseer eessr eessr esesr seesr esesr seesr seser esser sseer sseer esser seser rsese srese resse ersse serse esrse rssee srsee rssee srsee ssree ssree resse ersse rsese srese esrse serse sesre essre ssere ssere essre sesre
Note: these 'words' (valid or invalid) are all the permutations of the word erses. These words are obtained by scrambling the letters in erses.