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

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var gcd = GCD(c[0], c[1]);
        var ok = 0L;
        var ng = 1_000_000_001L;
        while (ng - ok > 1)
        {
            var mid = (ok + ng) / 2;
            if (mid * mid > gcd) ng = mid;
            else ok = mid;
        }
        WriteLine(ok * ok == gcd ? "Odd" : "Even");
    }
    static long GCD(long a, long b)
    {
        if (a < b) return GCD(b, a);
        if (a % b == 0) return b;
        return GCD(b, a % b);
    }
}