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: 'the bicyclists race toward an old brick church'. Reverse all words of length '2' in the given sentence.

A: the bicyclists race toward na old brick church
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Q: Sentence: 'a dog lays next to a bag on a couch'. Reverse all words of length '4' in the given sentence.

A: a dog syal txen to a bag on a couch
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Q: Sentence: 'someone is sitting on a elephant and messing with the seat'. Reverse all words of length '7' in the given sentence.

A:
enoemos is gnittis on a elephant and gnissem with the seat
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