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: 'many people flying kites in front of the white house in washington dc'. Reverse all words of length '4' in the given sentence.
Example Output: ynam people flying kites in front of the white house in washington dc

Example Input: Sentence: 'three people are sitting in the room playing video games'. Reverse all words of length '2' in the given sentence.
Example Output: three people are sitting ni the room playing video games

Example Input: Sentence: 'a man wears a necktie tied in an intricate knot'. Reverse all words of length '4' in the given sentence.
Example Output:
a man wears a necktie deit in an intricate tonk