#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll INF = ll(1e9)+5;

  
// GCD, LCM
// https://youtu.be/8lm8o8L9Bmw?t=2285
// https://youtu.be/XI8exXVxZ-Q?t=3595
// https://youtu.be/F2p_e6iKxnk?t=843
ll gcd(ll a, ll b) { return b?gcd(b,a%b):a;}
ll lcm(ll a, ll b) { return a/gcd(a,b)*b;}

int main() {
    ll A,B;
    cin >> A >>B;

    ll X = gcd(A,B);

    ll l=1;
    ll r = INF;
    while(l+1<r){
        ll mid = (l+r)/2;
        if(mid*mid<=X){
            l = mid;
        }else{
            r = mid;
        }
    }
    if(l*l==X){
        cout << "Odd" << endl; 
    }else{
        cout <<"Even" << endl;
    }

    return 0;
}