#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  string s = "hon";
  cin >> n;
  n = n % 10;
  n = 2;
  if (n == 2 || n == 4 || n == 5 || n == 7 || n == 9) {
    cout << "hon" << endl;
  }
  if (n == 0 || n == 1 || n == 6 || n == 8) {
    cout << "pon" << endl;
  }
  if (n == 3) {
    cout << "bon" << endl;
  }
}
