There are 55 students in class one of three years, 20 students participated in the school painting competition, 12 students participated in both painting competition and calligraphy competition, 14 students did not participate in both competitions, how many people participated in the calligraphy competition.
三年一班有学生55人，参加学校绘画比赛的有20人，既参加绘画比赛又参加书法比赛的有12人，两项比赛都没参加的有14人，参加书法比赛的有多少人．
<gadget id="calculator">55 - 14</gadget>
<output>41</output>

<gadget id="calculator">12 - 20</gadget>
<output>-8</output>

<gadget id="calculator">41 + (-8)</gadget>
<output>33</output>

<result>33</result>