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: 'a man riding a bike down a street past cars'. Reverse all words of length '4' in the given sentence.
[A]: a man riding a ekib nwod a street tsap srac


[Q]: Sentence: 'two large green and white jumbo jet planes on the tarmac'. Reverse all words of length '6' in the given sentence.
[A]: two large green and white jumbo jet senalp on the camrat


[Q]: Sentence: 'people are walking and standing on a sidewalk'. Reverse all words of length '3' in the given sentence.
[A]:
people era walking dna standing on a sidewalk