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 walking in the shore with a surfboard under his arm'. Reverse all words of length '3' in the given sentence.
[A]: a nam walking in eht shore with a surfboard under sih mra


[Q]: Sentence: 'a person in skis is standing in the snow'. Reverse all words of length '2' in the given sentence.
[A]: a person ni skis si standing ni the snow


[Q]: Sentence: 'a zebra looks at the grass at a zoo'. Reverse all words of length '2' in the given sentence.
[A]:
a zebra looks ta the grass ta a zoo