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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
FYI - I have modified the description:
The real problem is: what makes you think that these rules are not applied? Because you didn't see them in the example tests?? These represent at most 2% of the full batch of tests. Don't worry, DM is thurough with his tests.
Moreover, your point is not understandable because you give only the expected part. But the expected result of what?
You have imagined problems that just don't exist:
Cages are cages. Why would you imagine foxes can break out of a cage they cannot not break into?
This Kata only has foxes and chickens! What else do you imagine the chickens are in danger from?
You probably have a trailing newline.