using System;

using System.Text.RegularExpressions;

using System.IO;

public class Program

{

    public static void Main()

    {

        string input = "FW: [ReconciliationDaily_JHL_20190904]";

        string excelFile ="ReconciliationDaily_JHL_20190904.csv";

        Console.WriteLine(input.ToLower().Contains(Path.GetFileNameWithoutExtension(excelFile).ToLower()));

        bool output = Test(input);

        Console.WriteLine(output);

        printgroup(input);

    }

    //FTP Regex

    //private static readonly Regex reconRegex = new Regex(@"(ReconciliationDaily_{1,2})([a-zA-Z]+)(_{1,2})([0-9]{8})");

    //EMAIL Regex

    private static readonly Regex reconRegex = new Regex(@"(\[ReconciliationDaily_{1,2})([a-zA-Z]+)(_{1,2})([0-9]{8})\]");

    //private static readonly Regex reconRegexc =new Regex(@"(\[ReconciliationDaily_{1,2})([a-zA-Z]+)(_{1,2})([0-9]{8})\]");

    public static bool Test(string input)

    {

        return reconRegex.IsMatch(input);

    }

    public static void printgroup(string input)

    {

        var m = reconRegex.Match(input);

        foreach(var group in m.Groups)

        {

            Console.WriteLine(group);

        }

    }

}