#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  n = n % 10;
  switch (n) {
    case 2:
    case 4:
    case 5:
    case 7:
    case 9:
      cout << "hon\n";
      break;
    case 0:
    case 1:
    case 6:
    case 8:
      cout << "pon\n";
      break;
    case 3:
      cout << "bon\n";
      break;
  }
  return 0;
}
