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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.
Final tests don't check that two highest values are unique.
Only the example test case does.
list isn't a good parameter name. conflicts with built in, not sure if intentional or not but confusing for new programmers.