import java.util.*;
public class Main {
	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{
         System.out.println("bon");
      }
   }
}
