Tiger's sock box contains 10 red socks, 6 black socks, 8 white socks, and 2 patterned socks. Xiaohu randomly takes socks from the box, at least how many socks can be taken out to ensure that he can take out 2 pairs of socks.
小虎的袜子盒里有10只红袜，6只黑袜，8只白袜，2只花袜．小虎随意从盒中取袜子，至少取出多少只袜子，才能保证取出2双袜子．
<gadget id="calculator">4 + 1 + 1 + 1</gadget>
<output>7</output>

<result>7</result>