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 person is on the court and playing tennis'. Reverse all words of length '3' in the given sentence.

Ex Output:
a person is on eht court dna playing tennis


Ex Input:
Sentence: 'a river filled with lots of boats and surrounded by buildings'. Reverse all words of length '4' in the given sentence.

Ex Output:
a river filled htiw stol of boats and surrounded by buildings


Ex Input:
Sentence: 'a red fire hydrant sitting next to a tree'. Reverse all words of length '2' in the given sentence.

Ex Output:

a red fire hydrant sitting next ot a tree