#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

inline bool isSqr(ll n) {
  ll x = sqrt(n);
  for (ll i = x - 1; i <= x + 1; i++) {
    if (i * i == n) return true;
  }
  return false;
}

int main() {
  ll a, b;
  cin >> a >> b;
  ll g = gcd(a, b);
  cout << (isSqr(g) ? "Odd" : "Even") << endl;
  return 0;
}