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: 'two young boys standing on grass near a fence'. Reverse all words of length '8' in the given sentence.

Ex Output:
two young boys gnidnats on grass near a fence


Ex Input:
Sentence: 'a man is in the air riding a skateboard outside'. Reverse all words of length '2' in the given sentence.

Ex Output:
a man si ni the air riding a skateboard outside


Ex Input:
Sentence: 'a single cab of a train is pulled up to the depot'. Reverse all words of length '2' in the given sentence.

Ex Output:

a single cab fo a train si pulled pu ot the depot