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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
It means that your solution should correctly decode messages in which a single Morse 'dot' is represented by more than one '1'.
Your function returned
None
when it should return'00:00:00'
.None
is an object with no value.