Among the integers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, the number of prime numbers is x, the number of even numbers is y, and the number of perfect square numbers is z, then x+y +z=how much.
在整数0、1、2、3、4、5、6、7、8、9中，质数的个数为x，偶数的个数为y，完全平方数的个数为z，则x+y+z=多少．
<gadget id="calculator">4 + 5 + 4</gadget>
<output>13</output>

<result>13</result>