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Row Stacks and Suit Stacks
You will be building two kinds of stacks: row stacks and suit stacks. To free up cards that you need to build the suit stacks, you build row stacks.

In row stacks, cards are stacked in descending order, alternating between red cards and black cards. For example, you can play the two of hearts on the three of clubs.

In suit stacks, cards are stacked in ascending order, beginning with the ace. All cards in a suit stack have the same suit. For example, you can play the two of hearts on the ace of hearts.