// Entry points
static void Main(string[] args)
{
// Getting input
string inputtedString = StringOperations.ConcatenationInput(args);
// Output to console
Console.WriteLine(args.Length > 0 ? "String: " + inputtedString : "String is empty");
Console.WriteLine("String length: " + inputtedString.Length);
Console.WriteLine("Substring with unique symbols max length: " + StringOperations.MaxSubstringLength(inputtedString));
}