using System;

using System.Collections.Generic;

​

    public class PV

    {

        public string P;

        public string V;

    }

​

public class Program

{

    public static void Main()

    {

        Dictionary<PV,int> map = new Dictionary<PV,int>();

        PV first = new PV();

        first.P = "P";

        first.V = "v";

        map[first] =1;

        PV second = new PV();

        second.P = "P";

        second.V = "v";

        if (map.ContainsKey(second))

        {

            Console.WriteLine("YES sir second");

        }

        else

        {

            Console.WriteLine("SORRY sir second");

        }

        if (map.ContainsKey(first))

        {

            Console.WriteLine("YES sir first");

        }

        else

        {

            Console.WriteLine("SORRY sir first");

        }

    }

}