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: 'young calf being bottle fed above red bucket'. Reverse all words of length '3' in the given sentence.
Example Output: young calf being bottle def above der bucket

Example Input: Sentence: 'the cat is rolling on its back in the grass'. Reverse all words of length '5' in the given sentence.
Example Output:
the cat is rolling on its back in the ssarg