#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int64_t A, B;
  cin >> A >> B;
  int64_t g = gcd(A, B);
  int64_t h = sqrt(g);
  if (h * h == g) {
    cout << "Odd" << '\n';
  } else {
    cout << "Even" << '\n';
  }
  return 0;
}