Loading collection data...
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.
This comment is hidden because it contains spoiler information about the solution
great solution but the requirements say "name has exactly 4 letters" with your solution a string of 4 alphanumeric characters or just numbers would still be valid. The test wasn't testing the requiremets as described. But I love your solution anyway