Palindromes

using System;
using System.Collections.Generic;
using System.Linq;

namespace Palindromes
{
    class Palindromes
    {
        static void Main()
        {
            string[] input = Console.ReadLine().Split(new char[] { ' ', '.', ',', '!', '?' }, StringSplitOptions.RemoveEmptyEntries).ToArray();

            List<string> palindrom = new List<string>();
            for (int i = 0; i < input.Length; i++)
            {
                char[] word = input[i].ToCharArray();
                Array.Reverse(word);
                string tempWord = new string(word);
                if (input[i].Equals(tempWord))
                {
                    palindrom.Add(tempWord);
                }
            }
            List<string> result = new List<string>(palindrom.OrderBy(ord => ord).Distinct());
            Console.WriteLine(string.Join(", ", result));
        }
    }
}