In a dark room, there are 4 pairs of socks in two colors and two sizes (one pair of each color and each size) scattered on the shelf in a haphazard manner. If you do not leave the room, what is the minimum number of socks that need to be removed from the shelf? Put the socks in the suitcase to ensure that there are two pairs of socks in the suitcase, which are different colors and different sizes?
在一个暗室里，架子上杂乱无章地放有4双袜子，共有两种颜色和两种尺寸(每种颜色、每种尺寸各一双)，如果不离开房间，需要从架子上取下多少只最少的袜子放进衣箱，才能保证箱子里有两双袜子，它们的颜色不同，尺寸也不同？
<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<result>7</result>