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: 'yogurt bananas and grapes stand ready to make a smoothie'. Reverse all words of length '7' in the given sentence.
Example Output: yogurt sananab and grapes stand ready to make a smoothie

Example Input: Sentence: 'a person parasails in water with mountains in the background'. Reverse all words of length '4' in the given sentence.
Example Output: a person parasails in water htiw mountains in the background

Example Input: Sentence: 'a bacon lettuce and tomato sandwich with french fries on the side'. Reverse all words of length '6' in the given sentence.
Example Output:
a bacon lettuce and otamot sandwich with hcnerf fries on the side