static void Main(string[] args)
{
System.Console.WriteLine("CAH");
System.Console.WriteLine("SPS");
string input = System.Console.ReadLine();
if (input.ToLowerInvariant() == "partb")
{
System.Console.WriteLine(new DecoderRing(1000000000).FirstSix);
}
else if (input.ToLowerInvariant() == "partd")
{
System.Console.WriteLine(DecoderRing.Cycler(System.Console.ReadLine()));
}
System.Console.ReadKey();
}
public void TestPartD()
{
Assert.AreEqual(1260, DecoderRing.Cycler("ABCD"));
}