#include <iostream>
using namespace std;
using ll = long long int;

ll mygcd(ll a, ll b){
    while(b != 0){
        int r = a%b;
        a = b;
        b = r;
    }
    return a;
}

int main(){
    ll a, b;
    cin >> a >> b;
    ll g = mygcd(a, b);
    ll l = 0;
    ll r = 1000000001;
    while(r-l > 1){
        ll mid = (r+l)/2;
        if(mid*mid < g) l = mid;
        else r = mid;
    }
    for(ll i = l-100; i < l+100; i++){
        if(i*i == g){
            cout << "Odd" << endl;
            return 0;
        }
    }
    cout << "Even" << endl;
    return 0;
}