rmfr mrfr rfmr frmr mfrr fmrr rmrf mrrf rrmf rrmf mrrf rmrf rfrm frrm rrfm rrfm frrm rfrm mfrr fmrr mrfr rmfr frmr rfmr
Note: these 'words' (valid or invalid) are all the permutations of the word rmfr. These words are obtained by scrambling the letters in rmfr.