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.

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

Sentence: 'a very large truck with people in back on a city street'. Reverse all words of length '6' in the given sentence.
a very large truck with elpoep in back on a city teerts

Sentence: 'a cat sitting in the middle of a sink'. Reverse all words of length '1' in the given sentence.

a cat sitting in the middle of a sink