import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		long a = sc.nextLong();
		long b = sc.nextLong();
		sc.close();

		long g = gcd(a, b);
		long s = (long) Math.sqrt(g) - 10;
		for (long i = s; i < s + 20; i++) {
			if (i * i == g) {
				System.out.println("Odd");
				return;
			}
		}
		System.out.println("Even");
	}

	static long gcd(long a, long b) {
		return b == 0 ? a : gcd(b, a % b);
	}
}