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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.
Maybe you use "grEy" but not "grAy" in your map?
My code has a similar problem.
Tests with 4-letter words were passed.
But "attempt" tests has 5-letter words, as a result I have a 16s timeout.
Measured in the IDE: 20 seconds per 5-letter word.