There are 4 pairs of black chopsticks, white chopsticks, and red chopsticks that are exactly the same in shape, size, and material, and they are mixed together. You are required to close your eyes to ensure that you can find 2 pairs of chopsticks of different colors.
有形状、大小、材料完全相同的黑筷、白筷、红筷各4双，混杂在一起，要求闭着眼睛，保证从中摸出不同颜色的2双筷子，则至少要摸出多少根．
<gadget id="calculator">8 + 1 + 1 + 1</gadget>
<output>11</output>

<result>11</result>