using System;
using System.Collections.Generic;
using System.Linq;

public class Test
{
	public static void Main()
	{
		var testData = new List<List<int>>
		{
		     new List<int> { 1, 2, 3 },
		     new List<int> { 2, 1, 3 },
		     new List<int> { 6, 8, 3, 45,48 },
		     new List<int> { 9, 2, 4 },
		     new List<int> { 9, 2, 4, 15 }
		};
		
		var testSets = testData.Select(s => new HashSet<int>(s));
		
		var groupedSets = testSets.GroupBy(s => s, HashSet<int>.CreateSetComparer());
		
		foreach(var g in groupedSets)
		{
			var setString = String.Join(", ", g.Key);
			Console.WriteLine($" {g.Count()} | {setString}");
		}
	}
}