#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int d = n % 10;
  if ((d == 2) || (d == 4) || (d == 5) || (d == 7) || (d == 9))
    cout << "hon" << endl;
  else if ((d == 1) || (d == 1) || (d == 6) || (d == 8))
    cout << "pon" << endl;
  else
    cout << "bon" << endl;
  return 0;
}
