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 close up of the front of a train on train tracks'. Reverse all words of length '3' in the given sentence.
[A]: a close up of eht front of a train on train tracks


[Q]: Sentence: 'a man on skis is under an empty ski lift'. Reverse all words of length '1' in the given sentence.
[A]: a man on skis is under an empty ski lift


[Q]: Sentence: 'a small giraffe is standing close to a fence in the zoo'. Reverse all words of length '5' in the given sentence.
[A]:
a llams giraffe is standing esolc to a ecnef in the zoo