using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter months number");

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

        switch(monthNO)

        {

            case 1:

            Console.WriteLine("january");

            break;

            case 2:

            Console.WriteLine("feb");

            break;

            case 3:

            Console.WriteLine("march");

            break;

            case 4:

            Console.WriteLine("april");

            break;

            case 5:

            Console.WriteLine("may");

            break;

            case 6:

            Console.WriteLine("june");

            break;

            default:

            Console.WriteLine("enter valid number");

            break;

    }

    }

}