import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.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"); 
     }
    }
}