#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
using u64 = unsigned long long;
#define REP(i, n) for (int i = 0; (i64)(i) < (i64)(n); ++i)

#ifdef ENABLE_DEBUG
template <typename T>
void debug(T value) {
  cerr << value;
}
template <typename T, typename... Ts>
void debug(T value, Ts... args) {
  cerr << value << ", ";
  debug(args...);
}
#define DEBUG(...)                              \
  do {                                          \
    cerr << " \033[33m (L" << __LINE__ << ") "; \
    cerr << #__VA_ARGS__ << ":\033[0m ";        \
    debug(__VA_ARGS__);                         \
    cerr << endl;                               \
  } while (0)
#else
#define debug(...)
#define DEBUG(...)
#endif

vector<pair<i64, int>> factorize(i64 n) {
  vector<pair<i64, int>> res;
  for (i64 k = 2; k * k <= n; ++k) {
    int cnt = 0;
    while (n % k == 0) {
      n /= k;
      ++cnt;
    }
    if (cnt > 0) {
      res.emplace_back(k, cnt);
    }
  }
  if (n > 1) {
    res.emplace_back(n, 1);
  }
  return res;
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  i64 A, B;
  cin >> A >> B;
  i64 g = std::gcd(A, B);
  auto fs = factorize(g);
  bool is_odd = true;
  for (auto [_, k] : fs) {
    if ((k + 1) % 2 == 0) {
      is_odd = false;
      break;
    }
  }
  cout << (is_odd ? "Odd" : "Even") << endl;
}