#include <bits/stdc++.h>
using namespace std;

int main(){
  int a;
  cin >> a;
  if (a % 10 == 2 ||  == 4 || a % 10 == 5 || a % 10 == 7 || a % 10 ==9)
  {
    cout << "hon" << endl;
  }
  else if (a % 10 == 0 || a % 10 == 1 || a % 10 == 6 || a % 10 == 8)
  {
    cout << "pon" << endl;
  }
  else
  {
    cout << "bon" << endl;
  }
}