import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String n = input.next();
        int index = n.length() - 1;
        int num = (int)n.charAt(index) - 48;
        if (
                num == 2 ||
                num == 4 ||
                num == 5 ||
                num == 7 ||
                num == 9){
            System.out.println("hon");
        } else if (
                num == 0 ||
                num == 1 ||
                num == 6 ||
                num == 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