#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using i64 = long long int;
int main() {
  string a, b;
  cin >> a >> b;
  cout << (a.back() == '1' && b.back() == '1' ? "Odd" : "Even") << "\n";
  return 0;
}