#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  n = n / 100;
  if ((n == 2) || (n == 4) || (n == 5) || (n == 7) || (n == 9))
    cout << "hon" << endl;
  else if ((n == 0) || (n == 1) || (n == 6) || (n == 8))
    cout << "pon" << endl;
  else
    cout << "bon" << endl;
  return 0;
}
