using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Kaçıncı Aydayız:");

        int ay = Convert.ToInt32(Console.ReadLine());

        switch(ay)

          {

            case 12:

            case 1:

            case 2:

            Console.WriteLine("Kış mevsimi");

            break;

            case 3:

            case 4:

            case 5:

            Console.WriteLine("İlkbahar mevsimi");

            break;

            case 6:

            case 7:

            case 8:

            Console.WriteLine("Yaz mevsimi");

            break;

            case 9:

            case 10:

            case 11:

            Console.WriteLine("Sonbahar mevsimi");

            break;

                    }

    }

}