import java.util.*;
import java.lang.*;
import java.io.*;
 
class ClassA {
    public void dispA(){
        System.out.println("disp() method of ClassA");
    }
}
class ClassB extends ClassA {
    public void dispB(){
        System.out.println("disp() method of ClassB");
    }
}
class ClassC extends ClassB{
    public void dispC(){
        System.out.println("disp() method of ClassC");
    }
    public static void main(String args[]){
         ClassC c = new ClassC();
         c.dispA();
         c.dispB();
         c.dispC();
    }
}

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