#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef pair<ll, ll> P;
typedef vector<ll> VI;
typedef vector<VI> VVI;
const ll MOD = 1000000007;
const ll INF = 1e18;
#define REP(i, n) for (int i = 0; i < n; i++)
#define ALL(v) v.begin(), v.end()

int main(){
	ll a, b; cin >> a >> b;
	ll n=__gcd(a,b);
	ll s=sqrt(n);
	if(s*s==n)
		cout << "Odd" << endl;
	else
		cout << "Even" << endl;
	return 0;
}