import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		String ans;
		Scanner scn = new Scanner(System.in);
		String N = scn.nextLine();
		char n = N.charAt(N.length()-1);
		if(n == 3) {
			ans = "bon";
		}else if(n == 0 || n == 1 || n == 6 || n == 8) {
			ans = "pon";
		}else {
			ans = "hon";
		}
		System.out.print(ans);
	}
}