#include <iostream>
using namespace std;

int main(){
  int n;
  cin >> n;
  int m = n%10;
   if(m==3) cout << "bon" << endl;
  else if(m==0||m==1||m===6||m==8) cout << "pon" << endl;
  else cout << "hon" << endl;
  
 return 0; 
}