Lists of Sets and Sets of Lists

Write a program that reads several lines of integers. Each line of integers should be stored in
an object of type List<Integer>, and all the lines should be stored in an object of type
HashSet<List<Integer>>. Then the program should print out the contents of this set.

Code :

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import java.util.*;
 
class q2
{
 public static void main(String[] args) throws Exception
 {
  String morelines = "Yes";
  int j=0;
  while (!morelines.equals("No")) {
  Scanner input = new Scanner(System.in);
  System.out.println("Enter some integers (all on one line):");
  String linej = input.nextLine();
  String[] numsj = linej.split(" ");
 
  List<Integer> aj = new HashSet<List<Integer>>();
  for(int i=0; i<numsj.length; i++)
     aj.add(Integer.parseInt(numsj[i]));
 
  System.out.println("Do you want to enter some more lines? Yes or No");
  morelines = input.nextLine();
 
  j=j+1;
  }
  for (int i=0; i<j; i++)
  System.out.println("The integers are: "+ai);
 }
}

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Whats wrong with the code?

You cannot assign a HashSet to a List

Code :

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List<Integer> aj = new HashSet<List<Integer>>();//???

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It'd be more appropriate to create a new list for each line, add things, then add the list to a previously created HashSet

Code :

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HashSet< List<Integer> > aj = new HashSet<List<Integer>>();

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