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.
I was about to comment about this not handling ranges in descending order as well until I realised that the description specifies the numbers will be in ascending order.
Alas, I spent a lot of time making my solution work both ways :)
Pays to read the spec carefully. Good lesson.