#include <iostream>
using namespace std;
typedef long long ll;


template <class T>
T gcd(T a,T b){
	if(b == 0)return a;
	else return gcd(b,a%b);
}

int main(){
	ll A,B;
	cin >> A >> B;


	//Xが奇数となるのはXが平方数のとき.
	//2分探索で出来る.
	ll g = gcd(A,B);

	ll ok = 1;
	ll ng = 2e18;
	while(ng - ok > 1){
		ll mid = (ng + ok) / 2;
		if(g / mid < mid){
			ng = mid;
		}
		else ok = mid;
	}

	if(ok * ok == g){
		cout << "Odd" << endl;
	}
	else cout << "Even" << endl;
}