#pragma GCC optimize ("O2")
#pragma GCC target ("avx2")
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(int i = 0; i < (n); i++)
#define rep1(i, n) for(int i = 1; i <= (n); i++)
#define co(x) cout << (x) << "\n"
#define cosp(x) cout << (x) << " "
#define ce(x) cerr << (x) << "\n"
#define cesp(x) cerr << (x) << " "
#define pb push_back
#define mp make_pair
#define chmin(x, y) x = min(x, y)
#define chmax(x, y) x = max(x, y)
#define Would
#define you
#define please


int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);


	ll A, B;
	cin >> A >> B;

	ll g = __gcd(A, B);
	ll l = 0, r = 2e9;
	while (l + 1 < r) {
		ll wj = (l + r) / 2;
		if (g > wj * wj) l = wj;
		else r = wj;
	}

	if (r * r == g) co("Odd");
	else co("Even");

	Would you please return 0;
}