What will be the output of this code snippet?

What will be the output of this code snippet?

class Parent {
    int x = 10;
}
class Child extends Parent {
    int x = 20;
    void printX() {
        System.out.println(super.x);
    }
}
public class Test {
    public static void main(String[] args) {
        Child c = new Child();
        c.printX();
    }
}