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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.
Just not worded very well...
Suggestion:
Write a function that will take one argument, a string, as a word or sentence. The function should return the original string except reverse any word that has five or more letters. Strings passed in will consist of only letters and spaces. Spaces will be included in the result only when more than one word is present.