#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n % 10 == 2 || n % 10 == 4 || n % 10 == 5 || n % 10 == 7 || n % 10 == 9)
    cout << "hon";
  else {
    n /= 10;
    if (n / 10 == 3)
      cout << "bon";
    else
      cout << "pon";
  }
}
