#include <bits/stdc++.h>
using namespace std;
int main() {
  long long i, j, k, l, m, n, a, b, c, d, cnt = 0;
  cin >> n;
  m = n % 10;
  if (m == 2 || m == 4 || m == 5 || m == 7 || m == 9)
    cout << "hon" << endl;
  else if (m == 0 || m == 1 || m == 6 || m == 8)
    cout << "pon" << endl;
  else if (m == 3)
    cout << "bon" << endl;
}
