using System;

public class A
{
     public virtual string GetName()
     {
          return "A";
     }
 }

 public class B:A
 {
     public override string GetName()
     {
         return "B";
     }
 }

 public class C:B
 {
     public override string GetName()
     {
         return "C";
     }
     public static void Main()
	 {
	     A instance = new C();
	     Console.WriteLine(instance.GetName());
	 }
 }