import java.util.Scanner;

public class Test {
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    int n = Integer.parseInt(in.nextLine());
    int rem = n%10;
    if (rem == 2 || rem == 4 || rem == 5 || rem == 7 || rem == 9) {
    	System.out.println("hon");
    } else if (rem == 0 || rem == 1 || rem == 6 || rem == 8) {
    	System.out.println("pon");
    } else {
    	System.out.println("bon");
    }
  }
}