#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
  cin.tie(0);
  int n, k;
  cin >> n;
  k = n % 10;
  if (k == 2 || k == 4 || k == 6 || k == 7 || k == 0)
    cout << "hon";
  else if (k == 3)
    cout << "bon";
  else
    cout << "pon";
  return 0;
}
