import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      String n = sc.next();
      String[] ns = n.split("");
      if(ns[ns.length - 1].equals("2") || ns[ns.length - 1].equals("4") ||
        ns[ns.length - 1].equals("5") || ns[ns.length - 1].equals("7") || 
        ns[ns.length - 1].equals("9")){
		System.out.println("hon");
      } else if(ns[ns.length - 1].equals("3")){
      	System.out.println("bon");
      } else {
      	System.out.println("pon");
      }
      
      
	}
}
/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