#include <bits/stdc++.h>
using namespace std;
int main(int argc, char const *argv[]) {
  int N;
  cin >> N;
  switch (N % 10) {
    case 2:
    case 4:
    case 5:
    case 7:
    case 9:
      cout << "hon" << endl;
    case 0:
    case 1:
    case 6:
    case 8:
      cout << "pon" << endl;
    case 3:
      cout << "bon" << endl;
  }
  return 0;
}
