import java.util.Scanner;

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