Question 1210456
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When I was a child, I heard this joking puzzle from adults:


"There's a green thing hanging on the fence and squeaking. What is it?"


Answer: a herring.


Why is it hanging on the fence? - Because it was put there.
Why is it green? - Because it was painted green.
Why does it squeaking? - So no one would guess.


This problem from @CPhill is about the same level of nonsense as this puzzle.
Don't take it seriously - neither the problem itself nor the solution produced by @CPhill.
It's still the same green herring on the fence, squeaking.