There are 15 socks in each of the five colors of black, red, white, yellow, and blue in a cloth bag. How many socks must be taken from the cloth bag to ensure that there are three pairs of socks?
一只布袋中有黑、红、白、黄、蓝五种颜色的袜子各15只，从布袋中至少取出多少只才能保证有三双袜子？
<gadget id="calculator">6 + 2 + 2</gadget>
<output>10</output>

<result>10</result>