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