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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.
Everything looks good, could be improved by adding a few test cases
Could do with a better explanation of what is meant by 'lost number'
As it stands the current kata is way too easy. It needs some test cases that will make the user think and also needs to have a better description
Needs a better description rather than just the usage
Need to provide feedback as to what the values tested are when a test case fails