static void Main(string[] args)
{
ListyIterator <string> listyIterator = null;
string command;
while ((command = Console.ReadLine()) != "END")
{
var tokens = command.Split();
switch (tokens[0])
{
case "Create":
listyIterator = new ListyIterator <string>(tokens.Skip(1).ToArray());
break;
case "Move":
Console.WriteLine(listyIterator.Move());
break;
case "Print":
try
{
listyIterator.Print();
}
catch (InvalidOperationException ex)
{
Console.WriteLine(ex.Message);
}
break;
case "HasNext":
Console.WriteLine(listyIterator.HasNext());
break;
default:
throw new ArgumentException();
}
}
}