Implement a Function

Now that you$$ve written the function header and specification, it is time to implement the function. As the complexity of the functions you write increases, you may find it helpful to plan out your approach by breaking down your implementation into a series of $$pseudocode$$ steps. If you feel stuck at any point, we$$ve provided a series of $$pseudocode$$ steps for you to follow:

# $1.$ Slice $\text{'}$s$\text{'}$ from the beginning $($inclusive$)$ to 'start' $($exclusive$)$

# $2.$ Slice $\text{'}$s$\text{'}$ from 'start' $($inclusive$)$ to the end

# $3.$ Reverse the subsequence from step $2$

# $4.$ Concatenate the subsequences from steps $1$ and $3$

# $5.$ Return the result

Before testing your code for correctness with the Test Code button below, manually test your changes:

Enter $\%$run exercise.py in the IPython interpreter to ensure the file runs with no errors. If there are errors, use the information from them to debug your code.

Call the function using the examples provided in the docstring.

Call the function by passing your own values. Run the function as many times as you need in order to feel confident that it is behaving as expected.