#include <bits/stdc++.h>

using namespace std;

int main() {
    int m;
    cin >> m;

    set<int> st = {1, 7, 11, 17, 19, 21, 23, 25, 31, 33, 37};
    if (st.count(m) == 1) {
        cout << "even" << endl;
    } else {
        cout << "odd" << endl;
    }
    return 0;
}