#include <bits/stdc++.h>
using namespace std;
int main() {
  int N, a;
  cin >> N;
  N < 1000;
  a = N % 10;
  if (a == 2, 4, 5, 7, 9)
    cout << "hon";
  else if (a == 0, 1, 6, 8)
    cout << "pon";
  else
    cout << "bon";
}
