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: 'two small children and childrens books on a blue carpeted floor'. Reverse all words of length '1' in the given sentence.
Example Output: two small children and childrens books on a blue carpeted floor

Example Input: Sentence: 'someone gives a thumbs up next to his suitcase'. Reverse all words of length '4' in the given sentence.
Example Output:
someone gives a thumbs up txen to his suitcase