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