import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			char[] s = scanner.next().toCharArray();
			switch (s[s.length - 1]) {
			case '0':
			case '1':
			case '6':
			case '8':
				System.out.println("pon");
				break;
			case '2':
			case '4':
			case '5':
			case '7':
			case '9':
				System.out.println("hon");
				break;
			default:
				System.out.println("bon");
				break;
			}
		}
	}
}

/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