Mixed-up Socks

Start with three pairs of socks. Now mix them up so that no mismatched pair is the same as another mismatched pair. Is there more than one way to do it?
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Problem



Start with three pairs of socks. Now mix them up so that no mismatched pair is the same as another mismatched pair.

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Mixed-up Socks


Now try it with four pairs of socks. Is there more than one way to do it?

 

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