miff imff mfif fmif ifmf fimf miff imff mfif fmif ifmf fimf mffi fmfi mffi fmfi ffmi ffmi iffm fifm iffm fifm ffim ffim
Note: these 'words' (valid or invalid) are all the permutations of the word miff. These words are obtained by scrambling the letters in miff.