using System;

​

public class Program

{

    public static void Main()

    {

        string day = Console.ReadLine();

        switch (day)

        {

            case "Monday":

            case "Tuesday":

            case "Wednesday":

            case "Thursday":

            case "Friday":

                Console.WriteLine("Working day");

                break;

            case "Saturday":

            case "Sunday":

                Console.WriteLine("Weekend");

                break;

            default:

                Console.WriteLine("Error");

                break;

        }

    }

}