#include <bits/stdc++.h>
#define rep(i, a) for (int i = (int)0; i < (int)a; ++i)
using namespace std;
using ll = long long;

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

    ll X = gcd(A, B);

    if (X == 1) {
        cout << "Odd" << endl;
        return 0;
    }

    bool flag = false;
    for (ll i = 2; i < 1e7; i++) {
        if (X % i == 0) {
            flag = true;
            break;
        }
    }

    if (!flag) {
        if ((X % 6 == 1) || (X % 6 == 5)) {
            cout << "Odd" << endl;
            //cout << "Even" << endl;
        } else {
            cout << "Odd" << endl;
        }
        return 0;
    }

    ll result = 1;
    ll t = 0;
    while (X % 2 == 0) {
        t++;
        X /= 2;
    }
    result *= t + 1;

    for (ll i = 3; i < (ll)(sqrt(X) + 1); i += 2) {
        if (X % i != 0) continue;

        ll t = 0;
        while (X % i == 0) {
            t++;
            X /= i;
        }
        result *= t + 1;
    }
    if (X != 1) {
        result *= 2;
    }

    if (result % 2 == 0) {
        cout << "Even" << endl;
    } else {
        cout << "Odd" << endl;
    }

    return 0;
}