import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int one = Main.findDigits(n);
        switch (one) {
        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;
        case 3:
            System.out.println("bon");
            break;
        }
        sc.close();
    }

    private static int findDigits(int n) {
        int rtn = n;
        while (n > 0) {
            rtn %= 10;
            n /= 10;
        }
        return rtn;
    }

}

/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