#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  t = t % 10;
  if (t == 2 || t == 4 || t == 5 || t == 7 || t == 8)
    cout << "hon" << endl;
  else if (t == 0 || t == 1 || t == 6 || t == 8)
    cout << "pon" << endl;
  else
    cout << "bon" << endl;
}
