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