mfax fmax mafx amfx famx afmx mfxa fmxa mxfa xmfa fxma xfma maxf amxf mxaf xmaf axmf xamf faxm afxm fxam xfam axfm xafm
Note: these 'words' (valid or invalid) are all the permutations of the word mfax. These words are obtained by scrambling the letters in mfax.