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: 'the image shows the screen of a cell phone homepage'. Reverse all words of length '2' in the given sentence.
Example Output: the image shows the screen fo a cell phone homepage

Example Input: Sentence: 'two young boys standing on grass near a fence'. Reverse all words of length '8' in the given sentence.
Example Output: two young boys gnidnats on grass near a fence

Example Input: Sentence: 'a red double decker bus parked next to a brick building'. Reverse all words of length '4' in the given sentence.
Example Output:
a red double decker bus parked txen to a brick building