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 == 2 || N == 4 || N == 5|| N == 7 || N == 9) {
			System.out.println("hon");
		} else if (N == 0 || N == 1 || N == 6 || N == 8) {
			System.out.println("pon");
		} else {
			System.out.println("bon");
		}
	}

}