#include <bits/stdc++.h>
using namespace std;
int main(int argc, char const *argv[]) {
  int n, ans;
  cin >> n;
  if (n > 9) {
    ans = n / 10;
  } else {
    ans = n;
  }
  if (ans == 2 || ans == 4 || ans == 5 || ans == 7 || ans == 9) {
    cout << "hon" << endl;
  } else if (ans == 0 || ans == 1 || ans == 6 || ans == 8) {
    cout << "pon" << endl;
  } else {
    cout << "bon" << endl;
  }
  return 0;
}
