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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.
The instructions ask to return "true" or "false", this is not possible in Python.
Not sure if it works like this, but can the Python-instructions be changed to read "True" and "False".
Additionally, a portion of a string (to me) is equivalent to a slice, i.e. word[2:5], as far as I understand this exercises asks if str2 could be built from characters taken from str1 (without repeats, two "x"s in str2 require (at least) two "x"s in str1 one).
Maybe we could work on the wording a bit?
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