#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n / 10 % 2 || n / 10 % 4 || n / 10 % 5 || n / 10 % 7 || n / 10 % 9)
    cout << "hon" << endl;
  if (n / 10 % 0 || n / 10 % 8 || n / 10 % 6 || n / 10 % 8)
    cout << "pon" << endl;
  if (n / 10 % 3) cout << "bon" << endl;
}
