using System;
namespace P5_16
{
    class DayCollection
    {
        string[] days = { "Sun", "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat" };
        private int GetDay(string testDay)
        {
            int i = 0;
            foreach (string day in days)
            {
                if (day == testDay)
                {
                    return i;
                }
                i++;
            }
            return -1;
        }
        public int this[string day]
        {
            get
            {
                return (GetDay(day));
            }
        }
    }
    class Program
    {
        static void Main()
        {
            DayCollection week = new DayCollection();
            System.Console.WriteLine(week["Fri"]);
            System.Console.WriteLine(week["Made-up Day"]);
            Console.ReadLine();
        } 
     }
}
