Please choose the correct solution to the question: Where should I put the holes for the metal bar ?

Solution1: The metal bars should be near each other so they will hit each other when they catch the wind, so distance between each hole should be the length of the metal bar.

Solution2: The metal bars should be near each other so they will hit each other when they catch the wind, so distance between each hole should be the width of the metal bar.

Answer format: solution1/solution2
Answer: solution2