Here is another from our collection of interview questions:

Given a list of elements and a block size k, return the list of elements with every block of k elements reversed, starting from the beginning of the list. For instance, given the list 1, 2, 3, 4, 5, 6 and the block size 2, the result is 2, 1, 4, 3, 6, 5.

Your task is to write a function to solve the sublist-reversal problem. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.

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