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 couple are smiling at each other as they sit on a bench'. Reverse all words of length '4' in the given sentence.

A: the couple are smiling at hcae other as yeht sit on a bench
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Q: Sentence: 'one white and black sheep and one brown and black sheep'. Reverse all words of length '5' in the given sentence.

A: one etihw and kcalb peehs and one nworb and kcalb peehs
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Q: Sentence: 'a picnic table sits underneath a tree in the grass'. Reverse all words of length '2' in the given sentence.

A:
a picnic table sits underneath a tree ni the grass
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