using System;

public class parent
{
	public virtual void test()
	{
		Console.WriteLine("parent");
	}
}

public class child : parent
{
	public override void test()
	{
		Console.WriteLine("child");
	}
}

public class child2 : child
{
	public override void test()
	{
		Console.WriteLine("child2");
	}
}

public class Test
{
	public static void Main()
	{
		(new child2()).test();
	}
}