There are 5 red balls and 5 basketballs in a pocket, and the size and shape of these 10 balls are exactly the same. At least several balls must be taken from the pocket to ensure that two of them are of different colors.
一个口袋里装着5个红球和5个篮球，这10个球的大小、形状完全相同．至少要从口袋里取出几个球，才能保证其中有两个球的颜色不同．
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<result>6</result>