using System;

using System.Linq;

public class Program

{

    public static string[] Months = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };

    public static string ReformatDate(string date) {

        string[] segments = date.Split();

        string year = "", month = "", day = "";

        foreach(string seg in segments)

        {

            int monInd = Array.IndexOf(Months, seg) + 1;

            if (monInd > 0)

            {

                month = monInd < 10 ? "0" + monInd : monInd.ToString();

            }

            else if (char.IsLetter(seg.LastOrDefault()))

            {

                string daySeg = seg.Substring(0, seg.Length - 2);

                int dayN = Convert.ToInt32(daySeg);

                day = dayN < 10 ? "0" + daySeg : daySeg;

            }

            else

            {

                year = seg;

            }

        }

        return year + "-" + month + "-" + day;

    }

    public static void Main()

    {

        Console.WriteLine("UniLecs");

        // tests

        Console.WriteLine(ReformatDate("18th Aug 2021")); // 2021-08-18

        Console.WriteLine(ReformatDate("14th Apr 1990")); // 1990-04-14

        Console.WriteLine(ReformatDate("3rd Sep 1994"));  // 1994-09-03

    }

}