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: 'the firetruck carried the firefighters to the fire to put the blaze out'. Reverse all words of length '3' in the given sentence.

Answer: eht firetruck carried eht firefighters to eht fire to tup eht blaze tuo


Question: Sentence: 'there is a group of people standing on the beach'. Reverse all words of length '8' in the given sentence.

Answer: there is a group of people gnidnats on the beach


Question: Sentence: 'a small train going down the train track'. Reverse all words of length '5' in the given sentence.

Answer:
a llams niart gniog down the niart kcart