using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("SILAHKAN MASUKKAN NPM ANDA");

        String NPM=Console.ReadLine();

        if (NPM=="1831028")

        {

            Console.WriteLine("WELCOME VIVIA ELLYSINTA");

        }

        else if (NPM=="1841230")

        {

            Console.WriteLine("WELCOME KOKO GANTENG TAPI BANGSAT");

        }

        else if (NPM=="1841019")

        {

            Console.WriteLine("WELCOME CINDY NG");

        }

        else if (NPM=="1842009")

        {

            Console.WriteLine("WELCOME VINA MELISSA");

        }

        else if (NPM=="1831011")

        {

            Console.WriteLine("WELCOME KIM TAE HYUNG ILY");

        }

        else

        {

            Console.WriteLine("MAAF NPM ANDA TIDAK TERDAFTAR");

        }

    }

}