#include <iostream>
#include <cassert>
#include <string>
using namespace std;
using ull = unsigned long long;

void assert_binary(string& s) {
    for (auto c : s) {
        assert(c == '0' || c == '1');
    }
    assert(1 <= s.length() && s.length() <= 64);
}

int main() {
    string a, b;
    cin >> a >> b;
    assert_binary(a);
    assert_binary(b);
    ull aa = stoull(a, nullptr, 2);
    ull bb = stoull(b, nullptr, 2);
    if (aa % 2 && bb % 2) {
        cout << "Odd" << endl;
    } else {
        cout << "Even" << endl;
    }
    return 0;
}