import java.util.*;

public class Main {
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		String input = sc.next();
		char last = input.charAt(input.length()-1);
		if (last == '2' || last == '4' || last == '5' || last == '7' || last == '9') {
			System.out.println("hon");
		} else if (last == '0' || last == '1' || last == '6' || last == '8') {
			System.out.println("pon");
		} else {
			System.out.println("bon");
		}
		sc.close();
	}

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz