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 man walking a brown horse down a race track'. Reverse all words of length '4' in the given sentence.

Ex Output:
a man walking a brown horse nwod a ecar track


Ex Input:
Sentence: 'a row of parked buses sitting in front of a buiding'. Reverse all words of length '6' in the given sentence.

Ex Output:
a row of dekrap buses sitting in front of a buiding


Ex Input:
Sentence: 'a bathroom with a big mirror by the sink'. Reverse all words of length '8' in the given sentence.

Ex Output:

a moorhtab with a big mirror by the sink