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