namespace EvenOrOddExtention
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int input = 105;
            Console.WriteLine(input.EvenOrOdd());
        }
    }
    static class EvenOrOddExtention
    {
        public static string EvenOrOdd(this int input)
        {
            if (input % 2 != 0)
            {
                return "Odd";
            }
            return "Even";
        }
    }
}