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.
Sorry for the mishap, I have improved the description and added an example: if the string contains any character which is NOT alphabetic (in the above example there is a 0), then you return "Not letters" :)