#include <iostream>

using namespace std;

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