llwf llwf lwlf wllf lwlf wllf llfw llfw lflw fllw lflw fllw lwfl wlfl lfwl flwl wfll fwll lwfl wlfl lfwl flwl wfll fwll
Note: these 'words' (valid or invalid) are all the permutations of the word llwf. These words are obtained by scrambling the letters in llwf.