using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(GetDay(4));

            Console.ReadLine();

        }

​

        static string GetDay(int dayNum)

        {

            string dayName;

​

            switch (dayNum)

            {

                case 0:

                    dayName = "Sunday";

                    break;

​

                case 1:

                    dayName = "Monday";

                    break;

​

                case 2:

                    dayName = "Tuesday";

                    break;

​

                case 3:

                    dayName = "Wednesday";

                    break;

​

                case 4:

                    dayName = "Thursday";

                    break;

​

                case 5:

                    dayName = "Friday";

                    break;

​

                case 6:

                    dayName = "Saturday";

                    break;

                default:

                    dayName = "Invalid day number";

                    break;

            }

​

            return dayName;

    }

}