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.
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Question: Sentence: 'a tennis player is holding a tennis racket with the crowd in the background'. Reverse all words of length '3' in the given sentence.

Answer: a tennis player is holding a tennis racket with eht crowd in eht background


Question: Sentence: 'a couple of trains are sitting on some tracks'. Reverse all words of length '2' in the given sentence.

Answer: a couple fo trains are sitting no some tracks


Question: Sentence: 'a man wearing a vest and tie posing for the camera'. Reverse all words of length '1' in the given sentence.

Answer:
a man wearing a vest and tie posing for the camera