#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)(s); i < (int)(e); ++i)

int main() {
	cin.tie(nullptr);
	ios_base::sync_with_stdio(false);
	
	string A, B;
	cin >> A >> B;
	cout << ((A.back() == '1') && (B.back() == '1') ? "Odd\n" : "Even\n");
}