#include <bits/stdc++.h>
using namespace std;
int main(void) {
  int N;
  cin >> N;
  switch (N % 10) {
    case (2):
    case (4):
    case (5):
    case (7):
    case (9):
      cout << "hon\n";
      break;
    case (1):
    case (6):
    case (8):
    case (0):
      cout << "pon\n";
      break;
    default:
      cout << "bon";
  }
}
