Use six numbers from 1 to 6 to write a true fraction at will. It is known that there are always 4 people who write the true fraction with the same size. So, at least how many people participated in the writing.
用1～6六个数字任意写出一个真分数，已知参加写的人中总有4个人写出的真分数一样大．那么，至少有多少人参加写．
<gadget id="calculator">11 * 3</gadget>
<output>33</output>

<gadget id="calculator">33 + 1</gadget>
<output>34</output>

<result>34</result>