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