#include <bits/stdc++.h>
using namespace std;
int main() {
  string str;
  cin >> str;
  char last = str[str.size() - 1];
  if (last == '2' or last == '4' or last == '5' or last == '7' or last == '9')
    cout << "hon" << endl;
  else if (last == '1' or last == '6' or last == '8')
    cout << "pon" << endl;
  else if (last == '3')
    cout << "bon" << endl;
  return 0;
}
