import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt()%10;
		if(n == 3){
			System.out.println("bon");
		} else if(n < 2 || n == 6 || n == 8){
			System.out.println("pon");
		} else {
			System.out.println("hon");
		}
	}
}
