#include <algorithm>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

using namespace std;

typedef long long ll;

#define MOD 1000000007

ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }

int main() {
  ll a, b;
  cin >> a >> b;
  ll g = gcd(a, b);
  ll h = sqrtl(g);
  if (h * h == g) {
    cout << "Odd" << endl;
  } else {
    cout << "Even" << endl;
  }
  return 0;
}