#include <bits/stdc++.h>
using namespace std;
int main() {
  int N;
  cin >> N;
  if (N <= 9) {
    if (N == 2 || N == 4 || N == 5 || N == 7 || N == 9) {
      cout << "hon" << endl;
    }
    if (N == 0 || N == 1 || N == 6 || N == 8) {
      cout << "pon" << endl;
    }
    if (N == 3) {
      cout << "bon" << endl;
    }
  }
  if (N <= 99) {
    N = N % 10;
    if (N == 2 || N == 4 || N == 5 || N == 7 || N == 9) {
      cout << "hon" << endl;
    }
    if (N == 0 || N == 1 || N == 6 || N == 8) {
      cout << "pon" << endl;
    }
    if (N == 3) {
      cout << "bon" << endl;
    }
  }
  if (N <= 999) {
    N = N % 100;
    N = N % 10;
    if (N == 2 || N == 4 || N == 5 || N == 7 || N == 9) {
      cout << "hon" << endl;
    }
    if (N == 0 || N == 1 || N == 6 || N == 8) {
      cout << "pon" << endl;
    }
    if (N == 3) {
      cout << "bon" << endl;
    }
  }
  return 0;
}
