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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.
Duplicate issue, don't create another one if there is already an open issue about the same.
whots is '[]' ?
It made me a little bit wrong. I thought that a and b chould be elements of sequences, and they were any numbers.
Certainly a more complicated level. Not everyone knows Fibonacci sequence.
But the kata is interesting and cool.