#include <iostream>

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

}