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