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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.
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genius
wait what?
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they're opposite in order...
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@Xtrullor You need to add a parameter to the split method, see here.
Also are you using words[i].split('') with the parenthesis?
Have you checked your words[i] data type to ensure it's a string?
I have no idea why my solution is not working, in IDE it's work with any data on input but here: 'words[i].split is not a function'