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.
Hmm yeah it's possible you were seeing an error because there were no example test cases like bkaes suggested.
I've added some example test cases, so give it another go and let us know if you run into any more problems =)
There aren't any example test cases. Have you tried to submit the code instead?