#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, k;
  char n[3];
  cin >> n;
  if (n[2] == 2 || n[2] == 4 || n[2] == 5 || n[2] == 7 || n[2] == 9)
    cout << "hon" << endl;
  else if (n[2] == 0 || n[2] == 1 || n[2] == 6 || n[2] == 8)
    cout << "pon" << endl;
  else
    cout << "bon" << endl;
}
