#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 {
    cout << "bon" << endl;
  }
}
