gifh igfh gfih fgih ifgh figh gihf ighf ghif hgif ihgf higf gfhi fghi ghfi hgfi fhgi hfgi ifhg fihg ihfg hifg fhig hfig
Note: these 'words' (valid or invalid) are all the permutations of the word gifh. These words are obtained by scrambling the letters in gifh.