abstract class x
{
int a;
int b;
abstract void show();
public static void main(String s[])
{
b ob=new b();
ob.a=10;
ob.b=20;
ob.show();
x obj;
obj=ob;
obj.a=55;
obj.b=99;
obj.show();
ob.show();
}
}
class b extends x
{
void show()
{
System.out.println(a+" "+b);
}
}