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

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;
    string ans = "Odd";
    ll g = mygcd(a, b);
    bool iseven = 0;
    for(ll i = 2, t = g; i*i <= g; i++){
        if(t%i == 0){
            int cnt = 0;
            while(t%i == 0){
                cnt++;
                t /= i;
            }
            if(cnt%2 == 1) ans = "Even";
        }
    }
    cout << ans << endl;
    return 0;
}