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 group of five people in white snow outfits cross country skiing'. Reverse all words of length '5' in the given sentence.
Example Output: a puorg of five people in etihw snow outfits ssorc country skiing

Example Input: Sentence: 'a motorcycle parked on the street and next to parked cars'. Reverse all words of length '1' in the given sentence.
Example Output: a motorcycle parked on the street and next to parked cars

Example Input: Sentence: 'a person wind surfing in the ocean with a mountain in the background'. Reverse all words of length '5' in the given sentence.
Example Output:
a person wind surfing in the naeco with a mountain in the background