using System;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        var list = new List<Tuple<int, string>>();

        list.Add(Tuple.Create(31, "Jan"));
        list.Add(Tuple.Create(28, "Feb"));
        list.Add(Tuple.Create(31, "Mar"));
        list.Add(Tuple.Create(30, "Apr"));
        list.Add(Tuple.Create(31, "Jan"));

        list.Sort((Tuple<int, string> t1, Tuple<int, string> t2) => (t2.Item1 - t1.Item1));

        foreach (var t in list)
        {
            Console.WriteLine("{0} {1}", t.Item1, t.Item2);

        }
    }
}