#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  if (s[s.size() - 1] == '2' || s[s.size() - 1] == '4' ||
      s[s.size() - 1] == '5' || s[s.size() - 1] == '7' ||
      s[s.size() - 1] == '9')
    cout << "hon" << endl;
  else if (s[s.size() - 1] == 's.size()-1' || s[s.size() - 1] == '1' ||
           s[s.size() - 1] == '6' || s[s.size() - 1] == '8')
    cout << "pon" << endl;
  else if (s[s.size() - 1] == '3')
    cout << "bon" << endl;
}
