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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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Tests shouldn't use global variables.
Description says first There will always be one home island, always in the top left corner of the sea. then Each of 'p', 'u', 'm' and '~' can occur in any space of the map., which is contradictory.
The description is badly formatted.