import java.util.Scanner;

class At_Coder_01 {
  public static void main(String args[]) throws Exception {
      
      Scanner s = new Scanner(System.in);
      int N = s.nextInt();
      int a = N % 10;

      if (a == 2 || a == 4 || a == 5 || a == 7 || a == 9) {
          System.out.println("hon");
      }
      else if (a == 0 || a == 1 || a == 6 || a == 8) {
          System.out.println("pon");
      }
      else {
          System.out.println("bon");
      }
  }
}