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