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: 'three cows graze on the food that sits just outside their pens'. Reverse all words of length '5' in the given sentence.

A: eerht cows ezarg on the food that sits just outside rieht pens
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Q: Sentence: 'a view of a kitchen with a person cooking some food'. Reverse all words of length '1' in the given sentence.

A: a view of a kitchen with a person cooking some food
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Q: Sentence: 'an elephant is walking on some grass and some trees'. Reverse all words of length '5' in the given sentence.

A:
an elephant is walking on some ssarg and some seert
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