04 List Lab

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

namespace ConsoleApp5
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> numbers = Console.ReadLine()
               .Split(new char[] { ',', '.', ';', ':', '!', ' ', '"', '\\', '/', '[', ']', '(', ')', '\'' })
               .ToList();

            List<string> lowerCase = new List<string>();
            List<string> mixedCase = new List<string>();
            List<string> upperCase = new List<string>();

            foreach (var symbol in numbers)
            {
                bool lower = false;
                bool mixed = false;
                bool upper = false;



                    foreach (char letter in symbol)
                    {
                    if (symbol != "" && symbol != " ")
                    {
                        if (letter >= 'a' && letter <= 'z')
                        {
                            lower = true;
                        }
                        else if (letter >= 'A' && letter <= 'Z')
                        {
                            upper = true;
                        }
                        else
                        {
                            mixed = true;
                        }

                    }
                }




                if (symbol != "" && symbol != " ")
                {
                    if (lower && !mixed && !upper)
                    {
                        lowerCase.Add(symbol);
                    }

                    else if (!lower && !mixed && upper)
                    {
                        upperCase.Add(symbol);
                    }
                    else
                    {
                        mixedCase.Add(symbol);
                    }
                }

            }


            Console.WriteLine($"Lower-case: {string.Join(", ", lowerCase)}");
            Console.WriteLine($"Mixed-case: {string.Join(", ", mixedCase)}");
            Console.WriteLine($"Upper-case: {string.Join(", ", upperCase)}");
        }
    }
}