using namespace std;

int main(){
  string N;
  cin>>N;

  int k = N.size();
  char m =N.at(k-1);

   if (m=='2'||m=='4'||m=='5'||m=='7'||m=='9'){
    cout<<"hon"<<endl;
  }
  else if(m=='0'||m=='1'||m=='6'||m=='8'){
    cout<<"pon"<<endl;
  }
  else if(m=='3'){
    cout<<"bon"<< endl;
  }
  

 return 0;
}
