typedef long long ll;
typedef long double ld;
#include <bits/stdc++.h>
using namespace std;

int main() {
    ll a,b;
    std::cin >> a>>b;
    ll g = gcd(a,b);
    if( abs(sqrt(g)-round(sqrt(g)))<0.00000000001 ){
        std::cout << "Odd" << std::endl;
    }else{
        std::cout << "Even" << std::endl;
    }
}