using System;

public class Program

{

    public static void Main()

    {

        var s = "AppFolioSFR-fff112ce-c5b9-11ec-9c64-0e9fb0e3cbac-Unit B";

        s = s.Replace("AppFolioSFR-","");

        var y = "36";

        var x = 0;

        if (int.TryParse(y, out x))

                {

                    if (s.Length > x)

                    {

                        s = s.Substring(0, x);

                    }

                }

​

        Console.WriteLine(s);

    }

}