public class C {
public void f()
{
System.out.printf("CCC\n");
}

}public class D extends C{public void f() { System.out.printf("DDD\n");}

}

public class Exercise2 {
public static void g(C cc)
{
cc.f();
}

public static void main(String[] args) { D dd1=new D(); C cc1=new C(); g(cc1); g(dd1);}

}