mymh ymmh mmyh mmyh ymmh mymh myhm ymhm mhym hmym yhmm hymm mmhy mmhy mhmy hmmy mhmy hmmy ymhm myhm yhmm hymm mhym hmym
Note: these 'words' (valid or invalid) are all the permutations of the word mymh. These words are obtained by scrambling the letters in mymh.