#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  cout.precision(30);
  ;
  int n;
  cin >> n;
  n %= 10;
  if (n == '3')
    cout << "bon";
  else if (n == '0' || n == '1' || n == '6' || n == '8')
    cout << "pon";
  else
    cout << "hon";
  return 0;
}
