import java.util.*;
import java.io.*;
class Solution
{
  public static void main(String [] args)
  {
    Scanner sc=new Scanner(System.in);
    int N=sc.nextInt();
    if(N%10==2 || N%10==4 || N%10==5 || N%10==7 || N%10==9)
      System.out.println("hon");
    else if(N%10==0 || N%10==1 || N%10==6 || N%10==8)
      System.out.println("pon");
    else if(N%10==3)
      System.out.println("bon");
  }
}