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