There are 20 gloves of 5 colors with the same specifications (regardless of left and right hands), mixed in the box, feel the gloves from the box at will, at least how many gloves must be touched to ensure that they can be matched into 3 pairs.
有规格相同的5种颜色的手套各20只(不分左右手)，混装在箱内，随意从箱内摸手套，至少要摸出多少只手套才能保证配成3双．
<gadget id="calculator">6 + 2 + 2</gadget>
<output>10</output>

<result>10</result>