use std::cmp::*;
use std::io::*;

fn gcd(a: u64, b: u64) -> u64 {
    if b == 0 {
        return a;
    }
    gcd(b, a % b)
}

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let a: u64 = itr.next().unwrap().parse().unwrap();
    let b: u64 = itr.next().unwrap().parse().unwrap();

    let g = gcd(a, b);
    let h = ((g as f64).sqrt() + 0.5) as u64;
    if g == h {
        println!("Odd");
    } else {
        println!("Even");
    }
}