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