#include <bits/stdc++.h>
using namespace std;
int n;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> n;
  int d = n % 10;
  switch (d) {
    case 2:
    case 4:
    case 5:
    case 7:
    case 9:
      cout << "hon" << endl;
      break;
    case 0:
    case 1:
    case 6:
    case 8:
      cout << "pon" << endl;
      break;
    default:
      cout << "bon" << endl;
      break;
  }
  return 0;
}
