Mix 4 sticks of red, yellow, blue, and black together. If you close your eyes, how many sticks can you take each time to ensure you have two pairs of chopsticks?
把红、黄、蓝、黑四种颜色各4根混在一起，如果让你闭上眼睛，每次拿几根才能保证有两双筷子？
<gadget id="calculator">4 + 1 + 2</gadget>
<output>7</output>

<result>7</result>