class A {
    private int x=1;
    A(int x) {this.x = x;}
    public int get_x() {return x;}
}
class B extends A {
    B(int x) { super(x); }
}
public class inherit4 {
    public static void main(String[] args) {
	System.out.println(new B(4).get_x());
    }
}
// output: 4