using System;

public class Program

{

    public static void Main()

    {

        string a;

        int b;

        Console.WriteLine("Silahkan Masukkan NPM");

        a = Console.ReadLine();

        b = Convert.ToInt32(a);

        if (b == 1831158)

        {

            Console.WriteLine("Welcome Melvy");

        }

        else if (b == 1831157)

        {

            Console.WriteLine("Welcome Ricky");

        }

        else if (b == 1831159)

        {

            Console.WriteLine("Welcome Sw");

        }

        else if (b == 1831160)

        {

            Console.WriteLine("Welcome Tony");

        }

        else if (b == 1831161)

        {

            Console.WriteLine("Welcome Kelvin");

        }

        else

        {

            Console.WriteLine("NPM Tidak Ditemukan");

        }

    }

}