#include <bits/stdc++.h>
using namespace std;

int main() {
  string A, B;
  cin >> A >> B;
  if(A[A.size() - 1] == '1' and B[B.size() - 1] == '1') {
    cout << "Odd" << endl;
  } else {
    cout << "Even" << endl;
  }
}