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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.
This is not that hard,maybe you are not familiar with java.Get started from basic grammar
You can check the docs.
If you mean trouble for this specific kata, perhaps you should try solving the 8-kyu katas first.