There are 54 students in a certain class, 20 students participated in 100 meters, 18 students participated in long jump, 7 students participated in long jump and 100 meters, 6 students participated in high jump and 100 meters, 8 students participated in high jump and long jump, and 22 students participated in high jump , there is 1 person who did not participate in each item, how many people participated in all three items?
某班共有54人，参加百米的有20人，跳远的有18人，跳远和百米的有7人，跳高和百米的有6人，跳高和跳远的有8人，跳高有22人，各项没有参加的有1名，问三项都参加的有多少人？
<gadget id="calculator">22 - 7 - 6 - 8</gadget>
<output>1</output>

<gadget id="calculator">20 + 18 + 1</gadget>
<output>39</output>

<gadget id="calculator">54 - 1 - 39</gadget>
<output>14</output>

<result>14</result>