hackerRankPANCODE

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Text.RegularExpressions;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int counter = 0;
            string pattern = @"[A-Z]{5}[0-9]{4}[A-Z]";
            Regex regex = new Regex(pattern);
            List<string> output = new List<string>();
            do
            {
                string input = Console.ReadLine();
                if (regex.IsMatch(input) == true)
                {
                    output.Add("YES");
                }
                else
                {
                    output.Add("NO");
                }
                counter++;
            } while (counter < n);
            foreach (var item in output)
    {
        Console.WriteLine(item);
    }
        }
    }
}