using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication261
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = (Console.ReadLine());
            if (int.Parse(n) % 2 == 0)
            {
                Console.WriteLine("Even number entered: {0}", n);
                return;
            }
            else
            {
                while (int.Parse(n) % 2 != 0)
                {
                    n = Console.ReadLine();
                    Console.WriteLine("Invalid number!");

                    if (int.Parse(n) % 2 == 0)
                    {
                        Console.WriteLine("Even number entered: {0}", n);
                    }
                }
            }
        }
    }
}