#include <iostream>
#include <string>
#include <algorithm>
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
long double gcd(long long a, long long b) {
    if (a % b == 0) {
        return (b);
    }
    else {
        return (gcd(b, a % b));
    }
}
int main() {
    long long a, b;
    cin >> a >> b;
    long double c = gcd(a, b);
    if (sqrt(c) == floor(sqrt(c))) {
        cout << "Odd" << endl;
    }
    else {
        cout << "Even" << endl;
    }
	return 0;
}