Proba

using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Threading.Tasks;
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namespace _04_WinningTicket
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{
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    class Program
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    {
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        static void Main(string[] args)
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        {
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            var haveValidSimbols = "([$@#^])\\1{5,}";
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            var tickets = Console.ReadLine()
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                .Split(',')
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                .Select(x => x.Trim())
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                .ToArray();
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            var leftPart = "";
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            var rightPatr = "";
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            Regex regex = new Regex(haveValidSimbols);
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            foreach (var ticket in tickets)
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            {
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                if (ticket.Length != 20)
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                {
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                    Console.WriteLine("invalid ticket");
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                    continue;
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                }
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                leftPart = ticket.Substring(0, ticket.Length / 2);
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                rightPatr = ticket.Substring(ticket.Length / 2);
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                var leftMatch = regex.Match(leftPart);
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                var rightMatch = regex.Match(rightPatr);
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                if (leftMatch.Success && rightMatch.Success)// && leftMatch == rightMatch)
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                {
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                    var counter = Math.Min(leftMatch.Length, rightMatch.Length);
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                    var symbol = ' ';
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                    if (leftMatch.Value[0] != rightMatch.Value[0])
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                    {
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                        Console.WriteLine($"ticket \"{ticket}\" - no match");
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                        continue;
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                    }
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                    else
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                    {
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                        symbol = leftMatch.Value[0];
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                    }
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                    if (counter == 10)
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                    {
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                        Console.WriteLine($"ticket \"{ ticket}\" - {counter}{symbol} Jackpot!");
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                    }
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                    else
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                    {
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                        Console.WriteLine($"ticket \"{ ticket}\" - {counter}{symbol}");
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                    }
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                    counter = 0;
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                }
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                else
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                {
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                    Console.WriteLine($"ticket \"{ticket}\" - no match");
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                }
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            }
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        }
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    }
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}