import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		try(Scanner sc = new Scanner(System.in)) {
			
			String n = sc.next();
			
			if ( n.endsWith("2") ||	n.endsWith("4") || n.endsWith("5") ||
					n.endsWith("7") || n.endsWith("9") ) {
				System.out.println("hon");
			}
			else if (n.endsWith("0") ||	n.endsWith("1") || n.endsWith("6") || n.endsWith("8")) {
				System.out.println("pon");
				
			}
			else {
				System.out.println("bon");
			}
				
		}
	}

}
/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