instruction:
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.
question:
Sentence: 'a couple of giraffes standing in front of a metal fence'. Reverse all words of length '8' in the given sentence.
answer:
a couple of seffarig gnidnats in front of a metal fence


question:
Sentence: 'three traffic lights on the same pole one is lit red while the other two are green'. Reverse all words of length '2' in the given sentence.
answer:
three traffic lights no the same pole one si lit red while the other two are green


question:
Sentence: 'a man on a paddle board with a black dog swimming behind him'. Reverse all words of length '6' in the given sentence.
answer:

a man on a elddap board with a black dog swimming dniheb him