simple program check where we use the super keyword (Java) (211)

package com.company;
class parenth
{
    public parenth()
    {
        System.out.println("i am a constructor of grand father class.");
    }
    public parenth(int a)
    {
        System.out.println("i am overloaded constructor of a grand father class :  " +a);
    }
}
class child extends parenth
{

    public child()
    {
        super(0);
        System.out.println("i ma a constructor of a father class.");
    }
    public child(int b)
    {

        System.out.println("i am overloaded constructor of a  father class: ");
    }
}
public class Program48 {
    child o=new child();


}