Take out the big and small kings from a deck of playing cards, and there are 52 remaining cards. At least how many cards are randomly drawn to ensure that 2 cards are of the same suit.
从一副扑克牌中取出大、小王，剩下52张，至少任意抽出多少张才能保证有2张是同花色的．
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<result>5</result>