There is a class of students, each of whom has subscribed to one or more of "Little Friends", "Youth Daily", and "Children's Times". It is known that at least 6 of them ordered the same newspapers and magazines. So, what is the minimum number of people in this class?
有一个班的学生，每人都订阅了《小朋友》、《少年报》、《儿童时代》中的一种或几种．已知他们中至少有6个订的报纸杂志完全相同．那么，这个班最少有多少人．
<gadget id="calculator">3 + 3 + 1</gadget>
<output>7</output>

<gadget id="calculator">5 * 7</gadget>
<output>35</output>

<gadget id="calculator">35 + 1</gadget>
<output>36</output>

<result>36</result>