There are 6 red socks and 6 white socks in a drawer in a mess. Except for the different colors, these 12 socks are all the same. If you take out two socks of the same color from a drawer with your eyes closed, how many of them should you take out at least to ensure that two of them must be paired into a pair of the same color? What if it is red?
一只抽屉里杂乱无章地放着6只红袜子和6只白袜子，这12只袜子除去颜色不同，其他都相同．若闭着眼睛从抽屉中取出两只颜色相同的袜子，至少取出几只，才能保证其中必有两只配成颜色相同的一双？如果要是红色的呢？
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<result>3</result>