import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		 int N = sc.nextInt();
		 if(0<N && N<999) {
			  N = N % 10;
			 switch(N){
			 case 2:
			 case 4:
			 case 5:
			 case 7:
			 case 9:
				 System.out.println("hon");
				 break;
			 case 0:
			 case 1:
			 case 6:
			 case 8:
				 System.out.println("pon");
				 break;
			 case 3:
				 System.out.println("bon");
				 break;

			 }

			 sc.close();
		 }
	}
}
