Classes 3 and 4 lined up in teams with the same number of people in each row to participate in the school sports meeting. Xiao Cong's position is the 6th from the front, the 5th from the back, the 3rd from the left, and the 3rd from the right. How many students are there in Class 4?
三4班排成每行人数相同的队伍入场参加校运动会，小聪的位置从前数是第6个，从后数是第5个，从左数，从右数都是第3个，三4班共有多少个同学．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<result>50</result>