#include<bits/stdc++.h> using namespace std; int main(){ string s; cin >> s; int count = 0; for (int i = 0; i < s.length(); i++) { if (s[i] == '1') { count++; } } if (count % 2 == 1) { cout << "o" << endl; } else { cout << "e" << endl; } return 0; }