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