jkmg kjmg jmkg mjkg kmjg mkjg jkgm kjgm jgkm gjkm kgjm gkjm jmgk mjgk jgmk gjmk mgjk gmjk kmgj mkgj kgmj gkmj mgkj gmkj
Note: these 'words' (valid or invalid) are all the permutations of the word jkmg. These words are obtained by scrambling the letters in jkmg.