#include <bits/stdc++.h>

using namespace std;

int main() {
    long long a, b;
    cin >> a >> b;
    long long g = gcd(a, b);
    long long l = 1, r = 1e9 + 50;
    while (r - l > 1) {
        long long mid = (l + r) / 2;
        if (mid * mid <= g) {
            l = mid;
        } else {
            r = mid;
        }
    }
    cout << (l * l == g ? "Odd" : "Even") << '\n';
    return 0;
}