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: 'one person watches while the other flies a kite'. Reverse all words of length '7' in the given sentence.
Example Output: one person sehctaw while the other flies a kite

Example Input: Sentence: 'a man and woman standing with luggage in a waiting area'. Reverse all words of length '7' in the given sentence.
Example Output: a man and woman standing with egaggul in a gnitiaw area

Example Input: Sentence: 'a woman adjusts clock while several people watch'. Reverse all words of length '6' in the given sentence.
Example Output:
a woman adjusts clock while several elpoep watch