using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var path = "461dd744-fd56-4456-adfc-054aad0e699b/12203d5fc0b8a552099c149d072fbe269e70ce6280546fc9741d1b608afc596b6248/pages";

        var folders = new List<string>

        {

            "461dd744-fd56-4456-adfc-054aad0e699b/12203d5fc0b8a552099c149d072fbe269e70ce6280546fc9741d1b608afc596b6248/pages/",

            "461dd744-fd56-4456-adfc-054aad0e699b/12203d5fc0b8a552099c149d072fbe269e70ce6280546fc9741d1b608afc596b6248/pages/1/",

            "461dd744-fd56-4456-adfc-054aad0e699b/12203d5fc0b8a552099c149d072fbe269e70ce6280546fc9741d1b608afc596b6248/pages/1/test.svg",

            "461dd744-fd56-4456-adfc-054aad0e699b/12203d5fc0b8a552099c149d072fbe269e70ce6280546fc9741d1b608afc596b6248/pages/2/"

        };

        var listOfOffsets = folders

                .Select(

                    x => x

                        .AsSpan(path.Length, x.Length - path.Length)

                        .Slice(0, (x.LastIndexOf('/') - path.Length))

                        .Trim('/')

                        .ToString()

                    )

                .Where(x => !string.IsNullOrEmpty(x))

                .Distinct();

        foreach (var i in listOfOffsets)

        {

            Console.WriteLine(i);

        }

    }

}