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