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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.
Can't be changed.
arigatou!
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This comment is hidden because it contains spoiler information about the solution
and
So what?
Anyway it is now too late to change the description and the tests (3397 guys passed the kata...). When I wrote the kata, years ago, I choose "tenth of seconds" and it is not convenient to avoid that the max height calculation gives correct result. The cleverest saw the hole...
not an issue because the kata is not broken. you are more than likely seeing the expected value for a different test. try this: isolate one test example in sample tests
add_letters(2, {'z', 'a'}) == 'a'
and you will see the expected value is definitelya
not an issue...