gshh sghh ghsh hgsh shgh hsgh gshh sghh ghsh hgsh shgh hsgh ghhs hghs ghhs hghs hhgs hhgs shhg hshg shhg hshg hhsg hhsg
Note: these 'words' (valid or invalid) are all the permutations of the word gshh. These words are obtained by scrambling the letters in gshh.