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: 'the three trains are stopped on the railroad tracks'. Reverse all words of length '6' in the given sentence.
[A]: the three sniart are stopped on the railroad skcart


[Q]: Sentence: 'an aboveground subway car on a city street'. Reverse all words of length '6' in the given sentence.
[A]: an aboveground yawbus car on a city teerts


[Q]: Sentence: 'a couple of people ride down electronic stairs'. Reverse all words of length '2' in the given sentence.
[A]:
a couple fo people ride down electronic stairs