There are 45 students in Class 6 (1), 26 students participated in the mathematics group, 19 students participated in the language group, 8 students participated in both groups, and how many people did not participate in both groups.
六(一)班有45人，26人参加数学小组，19人参加语文小组，8人两个小组都参加了，有多少人两个小组都没有参加．
<gadget id="calculator">19 - 8</gadget>
<output>11</output>

<gadget id="calculator">26 + 11</gadget>
<output>37</output>

<gadget id="calculator">45 - 37</gadget>
<output>8</output>

<result>8</result>