#include <bits/stdc++.h>
using namespace std;

int main() {
    vector<int> v={0,1,1,3,1,1,4,3,7,1,6,7,5,11,1,3,10,7,6,11,4,17,8,19,6,5,7,11,27,1,6,3,28,27,11,7,28,25,31,11};
    int m; cin >> m;
    if(v[m-1] % 2) cout << "odd" << endl;
    else cout << "even" << endl;
    return 0;
}