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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.
Some details here: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution#print-input
you can print the input board and check out what you are missing out;)
If you get that error message, the answer isn't right. Also, in the error message, the first value is what your function returned, not the input. Read this