Related to the previous one, but this one is about the implementation rather than the description, so I open a fresh one.

errors:
'C!!NO!!' should equal False

Don't ask for different kinds of ouput, that's a very bad design. You don't wanna learn to code that way, and you don't wanna people to see you code that way... :p

2 ways to handle this:

1. return a specific string. That's just "not as bad" as the current setup, because you at least keep the kind of output constant, but the better way to handle this is...
2. throw an error and check in the tests that it's thrown when required (and only then).

what the... X(

> Errors

• why the hell isn't that told in the description that we have to handle incorrect outputs inputs?
• what is considered invalid? Not even told!

That's pretty bad... :(

Hi,

Your description is way too much incomplete.

• you didn't described the actual exact task
• it should hold without the external link. If it cannot because there are way too much data, maybe it's the kata itself that should not be?
• you have to at least give all the notations of the expected output and tell what they are/mean, especially since some of them may be different in the wiki page.