#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  n = n % 10;
  if (n == 3) cout << "bon" << endl;
  if (n < 2 || (n == 6 || n == 8))
    cout << "pon" << endl;
  else
    cout << "hon" << endl;
  return 0;
}
