using System;

class Program
{
    static void Main()
    {
        Console.Write("Enter even number: ");
        int a;
        while (int.TryParse(Console.ReadLine(), out a) == false || a%2!=0)
        {
                Console.WriteLine("The number is not even");
                Console.Write("Enter even number: ");
        }
        Console.WriteLine($"Even number entered: {a}");
    }
}