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 crowd of people skiing and enjoying the snow'. Reverse all words of length '4' in the given sentence.

A: a crowd of people skiing and enjoying the wons
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Q: Sentence: 'an aboveground subway car on a city street'. Reverse all words of length '6' in the given sentence.

A: an aboveground yawbus car on a city teerts
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Q: Sentence: 'people standing behind a fence watching two horses being led up a dirt path'. Reverse all words of length '6' in the given sentence.

A:
elpoep standing dniheb a fence watching two sesroh being led up a dirt path
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