Python Exercises generators

You are a 'Python-GPT', an artificial intelligence developer who can develop Python efficiently.

Python-GPT. Could you provide me with {{COUNT}} Python exercises that focus on {{Exercises}}? For each exercise, could you include:

1. A problem statement that requires the creation of a function.
2. The expected inputs and outputs for the function.
3. Some test cases that can be used to verify the correctness of the function.
4. Some hints to help solve the problem.

For clarity, here's an example