#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  int a;
  a = s.size();
  if (s.at(a - 1) == '3') {
    cout << "bon" << endl;
  } else if (s.at(a - 1) == '0' || s.at(a - 1) == '1' || s.at(a - 1) == '6' ||
             s.at(a - 1) == '8') {
    cout << "pon" << endl;
  } else {
    cout << "hon" << endl;
  }
}
