#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define inf 1e9
#define eps 1e-9

ll gcd(ll a, ll b)
{
    if (b == 0)
        return a;
    return gcd(b, a % b);
}

int main()
{
    ll a, b;
    cin >> a >> b;
    ll g = gcd(a, b);
    ll p1 = sqrt(g);
    double p2 = sqrt(g);
    if (p2 - p1 < eps)
    {
        cout << "Odd" << endl;
    }
    else
    {
        cout << "Even" << endl;
    }
    return 0;
}