using System;
using System.Collections.Generic;

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

        lDay.Add(31); lMon.Add("Jan");
        lDay.Add(28); lMon.Add("Feb");
        lDay.Add(31); lMon.Add("Mar");
        lDay.Add(30); lMon.Add("Apr");

        int[] aDay = lDay.ToArray();
        string[] aMon = lMon.ToArray();

        Array.Sort(aDay, aMon);

        for (int i = aDay.Length - 1; 0 <= i; i--)
        {
            Console.WriteLine("{0} {1}", aDay[i], aMon[i]);
        }
    }
}