rilk irlk rlik lrik ilrk lirk rikl irkl rkil kril ikrl kirl rlki lrki rkli krli lkri klri ilkr likr iklr kilr lkir klir
Note: these 'words' (valid or invalid) are all the permutations of the word rilk. These words are obtained by scrambling the letters in rilk.