using System;

public class Program

{

    public static void Main()

    {

        int a,b,c,d,l;

        Console.WriteLine("Enter values a,b,c,d");

        string x=Console.ReadLine();

        a=Convert.ToInt32(x.Split(' ')[0]);

        b=Convert.ToInt32(x.Split(' ')[1]);

        c=Convert.ToInt32(x.Split(' ')[2]);

        d=Convert.ToInt32(x.Split(' ')[3]);

        Console.Write("The greatest value is ");

        if((a>b) && (a>c) && (a>d))

            Console.Write("{0}",a);

        else if((b>c) && (b>d))

            Console.Write("{0}",b);

        else if(c>d)

            Console.Write("{0}",c);

        else

            Console.Write("{0}",d);

        Console.ReadLine();

    }

}