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 guy on  a surf board by a very big wave'. Reverse all words of length '3' in the given sentence.
[A]: a yug on a surf board by a very gib wave


[Q]: Sentence: 'the firetruck carried the firefighters to the fire to put the blaze out'. Reverse all words of length '3' in the given sentence.
[A]: eht firetruck carried eht firefighters to eht fire to tup eht blaze tuo


[Q]: Sentence: 'people riding bikes and cars down the street'. Reverse all words of length '5' in the given sentence.
[A]:
people riding sekib and cars down the street