#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <cmath>
using namespace std;
long long gcd(long long x, long long y){
    if(x % y == 0) return y;
    return gcd(y, x % y);
}
int main(){
    long long A, B;
    cin >> A >> B;
    long long temp = gcd(A, B);
    double t = sqrt((double)temp);
    long long t1 = t;
    for(long long i = max(0LL, t1 - 1); i <= t1 + 1; i++){
        if(i * i == temp) {
            cout << "Odd" << endl;
            return 0;
        }
    }
    cout << "Even" << endl;
}