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 couple of giraffes standing in front of a metal fence'. Reverse all words of length '8' in the given sentence.

A: a couple of seffarig gnidnats in front of a metal fence
****
Q: Sentence: 'two young boys standing on grass near a fence'. Reverse all words of length '8' in the given sentence.

A: two young boys gnidnats on grass near a fence
****
Q: Sentence: 'a square pizza with each side having different toppings'. Reverse all words of length '9' in the given sentence.

A:
a square pizza with each side having tnereffid toppings
****