?

Can you not just print out the inputs in the function to see them?

Your code also fails in repl.it. It's a problem on how you're sorting, you're mutating the names array at the same time you use it to get the original order, use a shallow copy.

Use Question label for things like this:

• Which language?
• What's your code? Remember to mark your post as having spoiler content.

With so little detail, it's only guesswork and it's very hard to help you.