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The Mongean shuffle, or Monge's shuffle, is performed as follows ( by a right-handed person ): Start with the unshuffled deck in the left hand and transfer the top card to the right.
Then repeatedly take the top card from the left hand and transfer it to the right, putting the second card at the top of the new deck, the third at the bottom, the fourth at the top, the fifth at the bottom, etc.
The result, if one started with cards numbered consecutively, would be a deck with the cards in the following order:.

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