public class Father{
	int a=100;
	int b=10;
	public void miner(){
		a--;
		}
	public static void main(String[] arg){
		Father x=new Father();
		Son y=new Son();
		System.out.println("a of son is :" +y.a);
		
		y.getA();
		y.miner();
		System.out.println("a of son is :"+y.a);
		y.getA();
		y.getB();
		System.out.println("b of son is :"+y.b);
		System.out.println("b of father is :"+x.b);
		}
	}
class Son extends Father {
	int a=0;
	public void getA(){
		System.out.println(super.a);
		}
	public int getB(){
		b=b-2;
		return b;
		}
	}