#include <bits/stdc++.h>
using namespace std;
int main() {
  int N;
  cin >> N;
  N %= 10;
  if (N == 2 || 4 || 5 || 7 || 9)
    cout << "hon" << endl;
  else if (N == 0 || 1 || 6 || 8)
    cout << "pon" << endl;
  else
    cout << "bon" << endl;
}
