There are 52 poker cards, 13 of each of four suits, at least how many cards are taken out of them to ensure that there are 5 cards of the same suit.
52张扑克牌，有四种花色各13张，至少从中取出多少张牌，才能保证有5张牌花色相同．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">16 + 1</gadget>
<output>17</output>

<result>17</result>