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

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    ll A,B; cin >> A >> B;
    ll X = gcd(A, B);
    auto f = [X](ll k) {
        return k * k <= X;
    };
    ll ok = 1, ng = 1e9+1;
    while(ng - ok > 1) {
        ll mid = (ok + ng) / 2;
        (f(mid) ? ok : ng) = mid;
    }
    cout << (ok * ok == X ? "Odd" : "Even") << endl;
}