using System;
using System.Linq;

namespace ConsoleApplication2
{
    class Program
	{
        static bool IsPalindrome(string s)
		{
            // the code:
			var x=s.ToLower().Where(char.IsLetterOrDigit);return x.SequenceEqual(x.Reverse());
		}
        
		static void Main()
		{
			TestPalindrome("racecar");
			TestPalindrome("rAceCaR");
			TestPalindrome("ra1cecar");
			TestPalindrome("ra1cec1ar");
			TestPalindrome("ra1c\te.c;1ar");
		}

		static void TestPalindrome(string s)
		{
			Console.WriteLine("[{0}] is {1}a palindrome", s, IsPalindrome(s) ? "" : "not ");
		}
	}
}