A bag contains several gloves of the same size in four colors of red, yellow, blue, and green. Ask: How many gloves must be touched at least to ensure that there are 3 pairs of the same color.
一只袋子中装有大小相同的红、黄、蓝、绿四种颜色的手套若干只，问：至少要摸出多少只手套才能保证有3副同色．
<gadget id="calculator">5 + 2 + 2</gadget>
<output>9</output>

<result>9</result>