Supermarket till (google images)

Weird string case begins separately for each word, not just every character :P Does that make sense now?

I tried looking over it, and I think you're swapping case based on input string. That's not correct, it doesn't matter if input is all uppercase or lowercase, it should work the same. It's all about indexes.

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Your code is very hard to read. Please use proper formatting (triple backticks + language) and post your code in reply here.

Well, you can see that with that input the position of the parentheses is invalid, so False is the right answer.

Read this: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution#print-input