muzz umzz mzuz zmuz uzmz zumz muzz umzz mzuz zmuz uzmz zumz mzzu zmzu mzzu zmzu zzmu zzmu uzzm zuzm uzzm zuzm zzum zzum
Note: these 'words' (valid or invalid) are all the permutations of the word muzz. These words are obtained by scrambling the letters in muzz.