using System;

using System.Collections.Generic;

using System.Collections.Immutable;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var g = ImmutableHashSet.CreateRange<int>(new[]{1,2,3});

        var u = ImmutableHashSet.CreateRange<int>(new[]{1,3,4});

        var r1 = g.Except(u); // delete

        var r2 = u.Except(g); // insert

        Console.WriteLine(string.Join(", ", r1.Select(n => n.ToString())));

        Console.WriteLine(string.Join(", ", r2.Select(n => n.ToString())));

    }

}