ghih hgih gihh ighh high ihgh ghhi hghi ghhi hghi hhgi hhgi gihh ighh ghih hgih ihgh high hihg ihhg hhig hhig ihhg hihg
Note: these 'words' (valid or invalid) are all the permutations of the word ghih. These words are obtained by scrambling the letters in ghih.