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.
Closing as of 9 years later, such error is very unlikely to happen. Also, your code will strip off the 2 last characters instead of just 1.
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I have this issue as well! Passes fine with my tests but when I submit it's an "Unknown Error"
I also ran into "Unknown Error" messages when trying to run my code in the code editor without specifying any test cases. Not sure if you might have had the same problem?
Cool--well done, and I'm glad you enjoyed it!