#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  ;
  int t, n, i;
  cin >> n;
  int x = n / 10;
  if (x == 2 || x == 34 || x == 5 || x == 7 || x == 9)
    cout << "hon" << endl;
  else if (x == 0 || x == 1 || x == 6 || x == 8)
    cout << "pon" << endl;
  else
    cout << "bon" << endl;
}
