import java.util.*;
class Main
{
    public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int d=n%10;
        if(d==2||d==4||d==5||d==7||d==9)
        System.out.println("hon");
        else if(d==0||d==1||d==6||d==8)
        System.out.println("pon");
        else
        System.out.println("bon");
    }
}
