public static void Main()
var a = "Buttle of the Wovels: hawaii vs grozny";
Console.WriteLine(new string(a.ToList().Except(b.ToList()).ToArray()));
Console.WriteLine("000000000000000000");
foreach(var i in a.ToList())
Console.WriteLine("111111111111111111111");
Console.WriteLine("----------------------");
Console.WriteLine("+++++++++++++++++++++++");
var nn = "u".ToCharArray();
char[] mm = new char[1] {'u'};
Console.WriteLine(nn[0] == mm[0]);
Console.WriteLine(nn[0].Equals(mm[0]));
Console.WriteLine("**********************");
var d = c.Except(b).ToArray();
Console.WriteLine(d.GetType());
Console.WriteLine(new string(d));
foreach(var i in a.Where(x => !b.Contains(x)))