using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Choose a month of the year! (1-12)");

        int day = int.Parse(Console.ReadLine());

        switch (day)

        {case 1: Console.WriteLine("31 days"); break;

         case 2: Console.WriteLine("28-29 days"); break;

         case 3: Console.WriteLine("31 days"); break;

         case 4: Console.WriteLine("30 days"); break;

         case 5: Console.WriteLine("31 days"); break;

         case 6: Console.WriteLine("30 days"); break;

         case 7: Console.WriteLine("31 days"); break;

         case 8: Console.WriteLine("31 days"); break;

         case 9: Console.WriteLine("30 days"); break;

         case 10: Console.WriteLine("31 days"); break;

         case 11: Console.WriteLine("30 days"); break;

         case 12: Console.WriteLine("31 days"); break;

         default: Console.WriteLine("Ima samo 12 meseca v godinata!"); break;

        }

    }

}