using System;

​

public class Program

    {

        public static void Main(string[] args)

        {

            Console.WriteLine("Enter first number: ");

            int i = int.Parse(Console.ReadLine());

            Console.WriteLine("Enter second number: ");

            int j = int.Parse(Console.ReadLine());

            Console.WriteLine("Enter third number: ");

            int k = int.Parse(Console.ReadLine());

            Console.WriteLine("Enter fourth number: ");

            int l = int.Parse(Console.ReadLine());

            int sum = i + j + k + l;

            Console.WriteLine("Sum of {0} + {1} + {2} + {3} = {4}", i, j, k, l, sum);

        }

    }