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 close up of the front of a train on train tracks'. Reverse all words of length '3' in the given sentence.

A: a close up of eht front of a train on train tracks
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Q: Sentence: 'man extending arm with three bananas crosswise on it'. Reverse all words of length '4' in the given sentence.

A: man extending arm htiw three bananas crosswise on it
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Q: Sentence: 'a couple sorts through items in luggage on top of a bed'. Reverse all words of length '6' in the given sentence.

A:
a elpuoc sorts through items in luggage on top of a bed
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