It is great that you solved the challenge, but instead of posting your full working solution, it is best to stay focused on answering the original poster’s question(s) and help guide them with hints and suggestions to solve their own issues with the challenge.
We are trying to cut back on the number of spoiler solutions found on the forum and instead focus on helping other campers with their questions and definitely not posting full working solutions.
You appear to have altered the seed code.
Please reset the step to restore the original code.
Then at the end of the .map method add the join method mentioned in the instructions.
Teller has provided an overview of your full code provided; whereas I only provided you with the location of the end of the .map function.
Sometimes, it is difficult to see where the end of codes are so we need to try several different times to locate where we need to be to add the required code.
Keep up the great progress, and know, everyone in here was or is a learner. Some just have had a bit longer in their journeys than others.
Wishing you more good progress on your coding journey.