futz uftz ftuz tfuz utfz tufz fuzt ufzt fzut zfut uzft zuft ftzu tfzu fztu zftu tzfu ztfu utzf tuzf uztf zutf tzuf ztuf
Note: these 'words' (valid or invalid) are all the permutations of the word futz. These words are obtained by scrambling the letters in futz.