#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); i ++)
using namespace std;
using ll = long long;
using PL = pair<ll,ll>;
using P = pair<int,int>;
constexpr int INF = 1000000000;
constexpr long long HINF = 1000000000000000;
constexpr long long MOD = 1000000007;// = 998244353;
constexpr double EPS = 1e-4;
constexpr double PI = 3.14159265358979;

int main() {
    ll A,B; cin >> A >> B;
    ll N = __gcd(A,B);
    ll x = max(sqrt(N) - 100,0.0);
    int cnt = 0;
    for (ll i = x; cnt < 300;++cnt,++x) {
        if (x * x == N) {
            cout << "Odd" << '\n';
            return 0;
        }
    }
    cout << "Even" << '\n';
    return 0;
}