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.

Example Input: Sentence: 'multiple people shopping around the farmers market during the day'. Reverse all words of length '6' in the given sentence.
Example Output: multiple elpoep shopping dnuora the farmers tekram gnirud the day

Example Input: Sentence: 'there are a lot of different items laying on the table'. Reverse all words of length '2' in the given sentence.
Example Output: there are a lot fo different items laying no the table

Example Input: Sentence: 'a baby is sitting on a laptop and reaching for the keys'. Reverse all words of length '3' in the given sentence.
Example Output:
a baby is sitting on a laptop dna reaching rof eht keys