In this task, you need to reverse all words of a given length in the sentence. The number of letters in a word determine its length. For example, the length of the word "apple" is 5.

Q: Sentence: 'a river filled with lots of boats and surrounded by buildings'. Reverse all words of length '4' in the given sentence.

A: a river filled htiw stol of boats and surrounded by buildings
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Q: Sentence: 'two young boys standing on grass near a fence'. Reverse all words of length '8' in the given sentence.

A: two young boys gnidnats on grass near a fence
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Q: Sentence: 'antelope gazelles and zebras drinking water at a watering hole'. Reverse all words of length '5' in the given sentence.

A:
antelope gazelles and zebras drinking retaw at a watering hole
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