using System;

public class Program

{

    public static void Main()

    {

        string civilite = "M.";

        switch (civilite)

        {

            case "M." :

                Console.WriteLine("Bonjour.Monsieur");

                break;

            case "Mme" :

            Console.WriteLine("Bonjour madame");

                break;

            case "Mlle" :

                Console.WriteLine("Bonjour mademoiselle");

                break;

    }

    }

}