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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.
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not a kata issue
Not a kata issue if your PC works differently.
On your PC, you probably have two methods for Subtract and LengthSquared for the struct Point that are not available here... so you
More over, there are langages where you can't redefine the '-' operator.
Finally, it is an issue with your code, not the kata itself.
First line:
Now you know why it fails. Also, you missed some word with 27 occurrences there, have you tried printing the input?