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.
You should print random the input and compare your solution with what is suggested. Alternatively, you can create your own tests by replacing the example cases with simple sentences like "the world is flat" then compare the reference solution output with yours.