Write a function that takes a string and returns a modified version where each word is reversed, and additionally, the case of each letter is inverted (uppercase to lowercase and vice versa).

Punctuation marks and spaces should remain unchanged. For example, given the string "Hello Kotlin!", the function should return "OLLEh NILTOk!".

Complete the code for the reverseAndInvertWords function.

1. Fill in the code.
2. You can copy the code into IntelliJ/Android Studio, but it shouldn’t be necessary.
3. Click “run” – the green triangle. The code will compile and several tests will be run.
4. In the logs, you will see “try again” if the solution is incorrect, or “success” and a special code.
5. Provide this code in the form below along with your email and click “send”.
6. Solutions will be presented the next day on Instagram