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