attws tatws attws tatws ttaws ttaws atwts tawts awtts watts twats wtats atwts tawts awtts watts twats wtats ttwas ttwas twtas wttas twtas wttas attsw tatsw attsw tatsw ttasw ttasw atstw tastw asttw sattw tsatw statw atstw tastw asttw sattw tsatw statw ttsaw ttsaw tstaw sttaw tstaw sttaw atwst tawst awtst watst twast wtast atswt taswt astwt satwt tsawt stawt awstt wastt aswtt sawtt wsatt swatt twsat wtsat tswat stwat wstat swtat atwst tawst awtst watst twast wtast atswt taswt astwt satwt tsawt stawt awstt wastt aswtt sawtt wsatt swatt twsat wtsat tswat stwat wstat swtat ttwsa ttwsa twtsa wttsa twtsa wttsa ttswa ttswa tstwa sttwa tstwa sttwa twsta wtsta tswta stwta wstta swtta twsta wtsta tswta stwta wstta swtta
Note: these 'words' (valid or invalid) are all the permutations of the word attws. These words are obtained by scrambling the letters in attws.