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 room with an open suitcase on the floor and clothes strewn about'. Reverse all words of length '2' in the given sentence.
Example Output: a room with na open suitcase no the floor and clothes strewn about

Example Input: Sentence: 'a river filled with lots of boats and surrounded by buildings'. Reverse all words of length '4' in the given sentence.
Example Output: a river filled htiw stol of boats and surrounded by buildings

Example Input: Sentence: 'a red and black bus parked at a bus station to pick up passengers'. Reverse all words of length '10' in the given sentence.
Example Output:
a red and black bus parked at a bus station to pick up sregnessap