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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.
Thanks for your comment. As you see the string is converted to lowercase at the start and since vanilla java doesn't have pythons zip() it starts with an IntStream range() to determine wether the current character is in an odd or even position - eda so after that I had to deal with upper and lower case separately (my goal was to put the whole solution into one statement)..nsi