#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
#include<cmath>
#include<algorithm>
#include<vector>
#include<numeric>
#include<set>
using namespace std;
using ll = long long;
vector<ll> enum_divisors(ll N) {
    vector<ll> res;
    for (ll i = 1; i * i <= N; ++i) {
        if (N % i == 0) {
            res.push_back(i);
            if (N/i != i) res.push_back(N/i);
        }
    }
    sort(res.begin(), res.end());
    return res;
}
int main(){
    ll a,b;
    cin >> a >> b;
    ll g = gcd(a,b);
    ll k = sqrt(g);
    cout << (k * k == g ? "Odd" : "Even") << endl;
}