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