This is the exact solution chatGPT gives. (Donst ask me how I know)

It is in the description and it can be seen in the example usage code. I guess I could write is extra clearly, but it is mentioned.

The kata was made for C# first of all, which is strongly typed, so there never was a question about what you need to return back then. Which programming language were you using? Maybe I can make it more clear from the inital state of the code too.

Yes it is.

Output string must be two numbers separated by a single space, and highest number is first.

Nowhere in the description of the problem does it say to return the values as strings yet the tests will only pass if you do.