The ages of the four are different, and the sum of their ages is 66 years old, and the oldest is 11 years older than the youngest. How old is the youngest person?
四人的年龄各不相同，其年龄和为66岁，其中最大的比最小的大11岁．年龄最小的人最大只能是多少岁．
<gadget id="calculator">66 - 1 - 2 - 11</gadget>
<output>52</output>

<gadget id="calculator">1 + 1 + 1 + 1</gadget>
<output>4</output>

<gadget id="calculator">52 / 4</gadget>
<output>13</output>

<result>13</result>