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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.
What even is
lengthand why do you changen?..This comment is hidden because it contains spoiler information about the solution
Thank you very much :D
You have an extra space in your return string.
you seem to have added a fullstop to the end of your string you've returned which does not match the expected output.
Unknown error is just a connection issue, just keep trying to submit and you should get through. :)
You should try to avoid capitalising the first letter of "minor words". That's why the test is expecting
"A bc"and not"A Bc".What do you mean when you say that you move the needle to a position? In this Kata you have to find the position of the needle that is already in the haystack.