fn gcd(a: usize, b: usize) -> usize {
    let r = a % b;
    if r > 0 { gcd(b, r) } else { b }
}

fn main() {
    let [a, b]: [usize; 2] = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let mut iter = buf.split_whitespace();
        [
            iter.next().unwrap().parse().unwrap(),
            iter.next().unwrap().parse().unwrap(),
        ]
    };

    let c = gcd(a, b);
    let d = (c as f32).sqrt() as usize;
    if c == d * d {
        println!("Odd");
    } else {
        println!("Even");
    }
}