#include <bits/stdc++.h>
using namespace std;
int main() {
  string N;
  char c;
  cin >> N;
  int size;
  size = N.size();
  c = N[size];
  switch (c) {
    case '2':
    case '4':
    case '5':
    case '7':
    case '9':
      cout << "hon" << endl;
      break;
    case '0':
    case '1':
    case '6':
    case '8':
      cout << "pon" << endl;
      break;
    case '3':
      cout << "bon" << endl;
      break;
  }
}
