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==3) System.out.println("bon");
		else System.out.println("pon");
	}
}
