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