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.
Probably you messed it up, click reset and try again, it works for me.
Make sure you're not confusing the logs, probably your function is returning 15 for the second sample test.
Please see if you can find anything helpful in this paragraph: https://docs.codewars.com/training/troubleshooting#print-input or in the article in general.