filk iflk flik lfik ilfk lifk fikl ifkl fkil kfil ikfl kifl flki lfki fkli kfli lkfi klfi ilkf likf iklf kilf lkif klif
Note: these 'words' (valid or invalid) are all the permutations of the word filk. These words are obtained by scrambling the letters in filk.