#include <algorithm>
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(), (x).end()
#define ll long long
#define ld long double
#define INF 1000000000000000000
typedef pair<ll, ll> pll;
typedef pair<int, int> pint;

long long GCD(long long a, long long b) {
    if (b == 0)
        return a;
    else
        return GCD(b, a % b);
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    ll A, B;
    cin >> A >> B;

    ll gcd = GCD(A, B);
    ll sq = floor(sqrt(gcd));
    if (sq * sq == gcd) {
        cout << "Odd" << endl;
    } else {
        cout << "Even" << endl;
    }
}