#include <bits/stdc++.h>
using namespace std;
void max_self(int &a, int b) { a = max(a, b); }
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n, d;
  cin >> n;
  d = n % 10;
  if (d == 2 || d == 4 || d == 5 || d == 7 || d == 9)
    cout << "hon";
  else if (d == 0 || d == 1 || d == 6 || d == 8)
    cout << "pon";
  else
    cout << "bon";
  return 0;
}
