#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using Graph = vector<vector<int>>;
#define rep(i,m,n) for(int (i)=(m);(i)<(n);++(i))
#define rREP(i,m,n) for(int (i)=(n)-1;(i)>=(m);--(i))
#define all(x) (x).begin(),(x).end()
#define out(y,x,h,w) (y)<0||(x)<0||(y)>=(h)||(x)>=(w)
constexpr int INF = 1000000001;
constexpr ll mod = 1000000007;
constexpr double PI = 3.1415926535897932;
template<class T>inline bool chmin(T& a, T b) {
	if (a > b) {
		a = b;
		return true;
	}
	return false;
}
template<class T>inline bool chmax(T& a, T b) {
	if (a < b) {
		a = b;
		return true;
	}
	return false;
}
inline void init() {
	cin.tie(nullptr); cout.tie(nullptr);
	ios::sync_with_stdio(false);
	cout << fixed << setprecision(15);
}

ll gcd(ll x, ll y) { return (y ? gcd(y, x % y) : x); }
ll lcm(ll x, ll y) { return x / gcd(x, y) * y; }

int main() {
	init();

	ll A, B; cin >> A >> B;
	ll num = gcd(A, B);
	map<int, ll>mp;
	for (int i = 2;i * i <= num;++i) {
		while (num % i == 0) {
			mp[i]++;
			num /= i;
		}
	}
	bool ans = false;
	for (auto p : mp) {
		if ((p.second + 1) % 2 == 0)ans = true;
	}
	cout << (ans ? "Even" : "Odd") << "\n";


	return 0;
}