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