There are 8 black, white, and yellow chopsticks in the cloth bag. If you want to find two pairs of chopsticks with different colors from these chopsticks, you must take at least how many chopsticks to meet this requirement.
布袋里黑、白、黄色的筷子各有8根，想从这些筷子中摸出颜色不同的两双筷子，至少取多少根，才能保证达到这个要求．
<gadget id="calculator">8 + 1 + 1 + 1</gadget>
<output>11</output>

<result>11</result>