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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.
But you're not supposed to use the split function.
The actual description of the challenge is weak, especially compared to most katas on this site that usually do a good job of describing the problem. It seems likely that it was written by a non-native English speaker. However, once you read it and figure out what it's asking you to do, it's a good coding challenge.
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