#include <bits/stdc++.h>

typedef long long ll;

using namespace std;

ll mygcd(ll a, ll b){
    if (a < b) swap(a, b);
    if (a == b || b == 0) return a;
    return mygcd(b, a % b);
}
int main(){
    ll a, b;
    cin >> a >> b;
    ll c = mygcd(a, b);
    for(ll i=1;i*i<=c;i++){
        if (i * i == c) {
            cout << "Odd" << endl;
            return 0;
        }
    }
    cout << "Even" << endl;
    return 0;
}