xomn oxmn xmon mxon omxn moxn xonm oxnm xnom nxom onxm noxm xmno mxno xnmo nxmo mnxo nmxo omnx monx onmx nomx mnox nmox
Note: these 'words' (valid or invalid) are all the permutations of the word xomn. These words are obtained by scrambling the letters in xomn.