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 group of sheep graze in a grassy field'. Reverse all words of length '2' in the given sentence.

A: a group fo sheep graze ni a grassy field
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Q: Sentence: 'a group of five people in white snow outfits cross country skiing'. Reverse all words of length '5' in the given sentence.

A: a puorg of five people in etihw snow outfits ssorc country skiing
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Q: Sentence: 'a man with glasses is making a face and eating'. Reverse all words of length '6' in the given sentence.

A:
a man with glasses is gnikam a face and gnitae
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