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: 'pair of dogs watching television in living area of home'. Reverse all words of length '8' in the given sentence.
Example Output: pair of dogs gnihctaw television in living area of home

Example Input: Sentence: 'a couch and table sits outside with fake sheep'. Reverse all words of length '1' in the given sentence.
Example Output: a couch and table sits outside with fake sheep

Example Input: Sentence: 'a young boy is brushing his teeth in the kitchen'. Reverse all words of length '7' in the given sentence.
Example Output:
a young boy is brushing his teeth in the nehctik