using System;

​

public class Program

{

    public static void Main()

    {

        int a, b, c, d, x, y, max;

        a = -6;

        b = 4;

        c = 14;

        d = 20;

        x = Math.Max(a, b);

        y = Math.Max(c, d);

        max = Math.Max(x, y);

        Console.WriteLine("the numbers are: " + a + " " + b + "" + c + "" + d);

        Console.WriteLine("the maximum is:" + max);

        Console.ReadLine();

    }

}