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