import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		long a = sc.nextLong();
		long b = sc.nextLong();
		long gcd = getGCD(a, b);
		long sqrt = (long)Math.sqrt(gcd);
		if (sqrt * sqrt == gcd) {
		    System.out.println("Odd");
		} else {
		    System.out.println("Even");
		}
    }
    
    static long getGCD(long x, long y) {
        if (x % y == 0) {
            return y;
        } else {
            return getGCD(y, x % y);
        }
    }
    
}