using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static List<string> Sort(string[] tenors) {

​

        // Désolé, j'ai lancé le test tard le soir, il y a sûrement du linq pour faire l'opération facilement mais 

        // Elle ne me vient pas là.

        foreach(string tenor in tenors)

        {

            var nbFromStr = Int32.Parse(Regex.Match(tenor, @"\d+").Value);

            var datePartType = tenor.Replace(nbFromStr.ToString(), "");

            switch (datePartType) {

                case "D":

                    Console.Error.WriteLine(nbFromStr);

                    break;

                case "W":

                    Console.Error.WriteLine(nbFromStr*7);

                    break;

                case "M":

                    Console.Error.WriteLine(nbFromStr*30);

                    break;

                case "Y":

                    Console.Error.WriteLine(nbFromStr*360);

                    break;

                default:

                    throw new Exception();

            };

        }

​

​

        return new List<string>(){@"bar", @"hello world", @"hello world"};

    }

    public static void Main()

    {

        string[] tenors =

        {

          "5M",

          "21D",

          "1D",

          "10D",

          "15M",

          "9M",

          "1M",

          "1W",

          "7D",

          "32D",

          "20Y",

          "1Y",

          "1D",

          "3W",

          "12M"

        };

        var sortedTenors = Sort(tenors);

        Console.WriteLine("Initial : [{0}]", string.Join(", ", tenors));

        Console.WriteLine("Sorted  : [{0}]", string.Join(", ", sortedTenors));

        string[] expectedTenors =

        {

              "1D",

              "1D",

              "7D",

              "1W",

              "10D",

              "21D",

              "3W",

              "1M",

              "32D",

              "5M",

              "9M",

              "12M",

              "1Y",

              "15M",

              "20Y"

        };

        Console.WriteLine("Expected  : [{0}]", string.Join(", ", expectedTenors));

    }

}