#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n % 10 == '0' || n % 10 == '1' || n % 10 == '6' || n % 10 == '8')
    cout << "pon";
  else if (n % 10 == '3')
    cout << "bon";
  else
    cout << "hon";
}
