#include <bits/stc++.h>
using namespace std;

int main () {
  long long n;
  cin >> n;
  n = n % 10;
  if (n == 2 || n == 4 || n == 5 || n == 7 || n == 9) cout << "hon";
  else if (n == 0 || n == 1 || n == 6 || n == 8) cout << "pon";
  else cout << "bon";
  return 0;
}