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.

[Q]: Sentence: 'this railway is lit up very well this evening'. Reverse all words of length '2' in the given sentence.
[A]: this railway si lit pu very well this evening


[Q]: Sentence: 'a couple of trains are sitting on some tracks'. Reverse all words of length '2' in the given sentence.
[A]: a couple fo trains are sitting no some tracks


[Q]: Sentence: 'large crowd of people taking pictures of cars driving by'. Reverse all words of length '2' in the given sentence.
[A]:
large crowd fo people taking pictures fo cars driving yb