#include <iostream>
#include <numeric>

using namespace std;

int main(){
    long long a,b;cin>>a>>b;
    long long x = gcd(a,b);
    if(x == 1){
        cout << "Odd" << endl;
        return 0;
    }
    long long mn = 1;
    long long mx = 1000000001;
    long long ce = (mx+mn)/2;
    while(mx-mn>1){
        if(ce*ce == x){
            cout << "Odd" << endl;
            return 0;
        }else if(ce*ce > x){
            mx = ce;
        }else{
            mn = ce;
        }
        ce = (mx+mn)/2;
    }
    cout << "Even" << endl;
}