Re: riddling day for donkeys.
I'unno. Tough. Can't get it below 19 minutes.
Man 1 & man 4 cross - 10 minutes.
Man 1 returns - 11 minutes.
Man 1 & man 3 cross - 16 minutes.
Man 1 returns -17 minutes.
Man 1 & man 2 cross - 19 minutes.
I can't think of a more efficient combination than that.
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