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