import java.util.*;

public class Main {
    public static void main(String[] args){

    Scanner scan = new Scanner(System.in);
    Integer n = scan.nextInt();

    if(n%10==3){
        System.out.println("bon");
    } else if(n%10==0 || n%10==1 || n%10==6 || n%10==8 ){
        System.out.println("pon");     
    } else {
        System.out.println("hon");     
    }  

    scan.close();
    }    
}