thssa htssa tshsa sthsa hstsa shtsa thssa htssa tshsa sthsa hstsa shtsa tssha stsha tssha stsha sstha sstha hssta shsta hssta shsta sshta sshta thsas htsas tshas sthas hstas shtas thass htass tahss athss hatss ahtss tsahs stahs tashs atshs saths asths hsats shats hasts ahsts sahts ashts thsas htsas tshas sthas hstas shtas thass htass tahss athss hatss ahtss tsahs stahs tashs atshs saths asths hsats shats hasts ahsts sahts ashts tssah stsah tssah stsah sstah sstah tsash stash tassh atssh satsh astsh tsash stash tassh atssh satsh astsh ssath ssath sasth assth sasth assth hssat shsat hssat shsat sshat sshat hsast shast hasst ahsst sahst ashst hsast shast hasst ahsst sahst ashst ssaht ssaht sasht assht sasht assht
Note: these 'words' (valid or invalid) are all the permutations of the word thssa. These words are obtained by scrambling the letters in thssa.