import java.util.Scanner;

public class Main{
  public static void main(String args []){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int ans = a % 10;
    switch(ans){
      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 0:
        System.out.println("bon");
        break;
    }
  }
}