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

// 最大公約数
ll gcd(ll a, ll b) {
    if (b == 0) return a;
    else return gcd(b, a % b);
}

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

    ll x = gcd(A, B);

    map<ll, ll> vx;
    for (int i = 2; i <= sqrt(x); i++) {
        ll ext = 0;
        while (x % i == 0) {
            ext++;
            x /= i;
        }
        vx[i] = ext;
    }
    if (x != 1) vx[x] = 1;

    ll cnt = 0;
    for (auto y : vx) {
        cnt += y.second;
    }

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

// 1000000000000000000 1000000000000000000