import java.util.*;

public class Main{
	public static void main(String args[]){
      Scanner sc = new Scanner(System.in);
      String books = sc.next();
      char x = books.charAt(books.length()-1);
      switch(x){
        case '2':
        case '4':
        case '5':
        case '7':
        case '9':
          System.out.println("hon");
          break;
        case '0':
        case '1':
        case '6':
        case '8':
          System.out.println("pon");
          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