I need some help solving this 2-Feistel round problem. Please list the distinguisher attack on the library with an explanation. PLEASE do not copy and paste from the other incorrect answers previously posted. I will rate you!

2. Show that a 2-round keyed Feistel cipher cannot be a secure PRP, no matter what its round functions are. Your attack should work without knowing the round keys, and it should work even with different (independent) round keys. Hint: A successful attack requires two queries