#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);

    if (x == 1 || ((ll)sqrt(x) * (ll)sqrt(x) == x)) {
        cout << "Odd" << endl;
    } else {
        cout << "Even" << endl;
    }
}

// 1000000000000000000 1000000000000000000