12 Mixed-up Days of Christmas

A Days deck is shuffled and each player receives twelve face-up cards in a 2x6 grid, representing the "days of Christmas" from the traditional song. A Moves deck is then placed in the center of the table, and players take turns flipping over one card, which determines how many cards a player may swap: either with a card from an opponent's grid, or within one's own grid, to try to put the cards in numerical order from 1-12. The first person to do this wins.