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: 'the city bus has a feature film ad on the side of it'. Reverse all words of length '4' in the given sentence.

Ex Output:
the ytic bus has a feature mlif ad on the edis of it


Ex Input:
Sentence: 'a large red truck on a city street'. Reverse all words of length '4' in the given sentence.

Ex Output:
a large red truck on a ytic street


Ex Input:
Sentence: 'a group of people that are sitting near train tracks'. Reverse all words of length '3' in the given sentence.

Ex Output:

a group of people that era sitting near train tracks