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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.
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Please fix this Kata
Yes, second sentence fixes the unnecessary addition of the first one.
Step 6 is misleading or wrong (I see that it is copied from Wiki).
"Append 3 zeros if result contains less than 3 digits."
If you did that "C60" would become "C60000". It should be "Append zeros until result contains at least 3 digits".