import java.util.Scanner;

class Main{
 public static void main(String args[]){
   Scanner sc = new Scanner(System.in);
   int s = sc.nextInt();

   if(s%10==2||s%10==4||s%10==5||s%10==7||s%10==9){
     System.out.println("hon");
   }
   else if(s%10==0||s%10==1||s%10==6||s%10==8){
     System.out.println("pon");
   }
   else if(s%10==3){
     System.out.println("bon");
   }
 
 }
}
