#![allow(unused_imports)]
#![allow(non_snake_case)]
use std::cmp::*;
use std::collections::*;
use std::io::Write;

#[allow(unused_macros)]
macro_rules! debug {
    ($($e:expr),*) => {
        #[cfg(debug_assertions)]
        $({
            let (e, mut err) = (stringify!($e), std::io::stderr());
            writeln!(err, "{} = {:?}", e, $e).unwrap()
        })*
    };
}

fn gcd(a: i128, b: i128) -> i128 {
    if b == 0 {
        return a;
    }
    gcd(b, a % b)
}

fn main() {
    let v = read_vec::<i128>();
    let (a, b) = (v[0], v[1]);
    let g = gcd(a, b);
    let root = (g as f64).sqrt() as i128;
    for i in root - 5..root + 5 {
        if g == i * i {
            println!("Odd");
            return;
        }
    }
    println!("Even");
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}