#include <bits/stdc++.h>
using namespace std;
int n;
int32_t main() {
  cin >> n;
  if (n < 10) {
    cout << "pon";
    return 0;
  }
  n = n / 10;
  n = n % 10;
  if (n == 2 || n == 4 || n == 5 || n == 7 || n == 9) {
    cout << "hon";
    return 0;
  } else if (n == 0 || n == 1 || n == 6 || n == 8) {
    cout << "pon";
    return 0;
  } else {
    cout << "bon";
  }
  return 0;
}
