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: 'a row of parked buses sitting in front of a buiding'. Reverse all words of length '6' in the given sentence.
Example Output: a row of dekrap buses sitting in front of a buiding

Example Input: Sentence: 'several people flying kites on a sandy beach'. Reverse all words of length '7' in the given sentence.
Example Output: lareves people flying kites on a sandy beach

Example Input: Sentence: 'a cow standing by the fence as it looks towards the camera'. Reverse all words of length '5' in the given sentence.
Example Output:
a cow standing by the ecnef as it skool towards the camera