using System;
using static System.Console;
using static System.Math;
using System.Numerics;
using System.Collections.Generic;
using System.Linq;


namespace AtCoder
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //var s = Conasole.ReadLine().Split(' ')
            var s = Console.ReadLine().Split(' ').Select(long.Parse).ToArray();
            long gcd = Gcd(s[0], s[1]);
            double root = Sqrt(gcd);

            string str = "Even";
            if (root == (long)root)
            {
                str = "Odd";
            }
            WriteLine(str);
            Out.Flush();
        }
        public static long Gcd(long n, long m)
        { return n % m == 0 ? m : Gcd(m, n % m); }


    }



}