import java.util.Scanner;

public class Main{
  public static void main(String[] args){
	  Scanner sc = new Scanner(System.in);
	  String s=sc.next();
	  int n=Integer.valueOf(s.substring(s.length()-1, s.length()));
	  if(n==2||n==4||n==5||n==7||n==9) {
		  System.out.println("hon");
	  }else if(n==0||n==1||n==6||n==8) {
		  System.out.println("pon");
	  }else {
		  System.out.println("bon");
	  }
  }
}