13 children play hide-and-seek together. In the end, 2 children hide the most skillfully and are not caught. May I ask how many children were caught?
13个孩子在一起捉迷藏的游戏，最后有2个孩子躲得最巧，没有捉到，请问被捉到的孩子有多少个．
<gadget id="calculator">13 - 1 - 2</gadget>
<output>10</output>

<result>10</result>