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.

Ex Input:
Sentence: 'a grey clock tower with trees and wall below'. Reverse all words of length '5' in the given sentence.

Ex Output:
a grey kcolc rewot with seert and wall woleb


Ex Input:
Sentence: 'several people flying kites on a sandy beach'. Reverse all words of length '7' in the given sentence.

Ex Output:
lareves people flying kites on a sandy beach


Ex Input:
Sentence: 'an old run down truck that is rusted and parked in a grassy area'. Reverse all words of length '2' in the given sentence.

Ex Output:

na old run down truck that si rusted and parked ni a grassy area