#include <bits/stdc++.h>
using namespace std;
#define rep(i, n)                    \
  for (int i = 0; i < (int)(n); i++) \
    ;

#define _GLIBCXX_DEBUG
#define _LIBCPP_DEBUG 0

int main() {
  int n;
  cin >> n;

  int a = n % 10;
  if (a == 2 || a == 4 || a == 5 || a == 7 || a == 9) {
    cout << "hon" << endl;
  } else if (a == 0 || a == 1 || a == 6 || a == 8) {
    cout << "pon" << endl;
  } else {
    cout << "bon" << endl;
  }
}
