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