[Philo]

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I got it. Posting the answer in white below.

<font color="white"> Make a pile of 18 and a pile of 32. Then turn the pile of 32 upside-down.
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<font color="white"> this doesn't make sense, if you have a pile of 32 that is half heads and half tails, the flipped pile will be the same, the coins aren't already in piles, that would be stupidly easy
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Huh? Explain.

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<font color="white">He's saying that this won't work b/c if the pile of 32 happens to have 16 heads and 16 tails, then after flipping them that pile will still have 16 heads and 16 tails, so nothing has changed, so that can't work. </font>