using System;

class GodisnjaDoba {
  static void Main() {
    Console.Write("Mesec: ");
    int m = int.Parse(Console.ReadLine());
    switch(m) {
      case 12: case 1: case 2:
        Console.WriteLine("Zima");
        break;
      case 3: case 4: case 5:
        Console.WriteLine("Prolece");
        break;
      case 6: case 7: case 8:
        Console.WriteLine("Leto");
        break;
      case 9: case 10: case 11:
        Console.WriteLine("Jesen");
        break;
      default:
        Console.WriteLine("Greska!");
        break;
    }
  }
}