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.
This comment is hidden because it contains spoiler information about the solution
The comma means your code should remove one character from the input string provided to the function as a parameter and add it to a tape-like memory. The dot means it gets copied from memory to a variable later to be returned.