#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

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  i64 A, B;
  cin >> A >> B;
  i64 g = std::gcd(A, B);
  i64 k = 1;
  i64 cnt = 0;
  for (k = 1; k * k <= g; ++k) {
    if (g % k == 0) {
      if (g / k > k) {
        cnt += 2;
      } else {
        cnt++;
      }
    }
  }
  cout << (cnt % 2 == 1 ? "Odd" : "Even") << endl;
}