TASK DEFINITION: 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.
PROBLEM: Sentence: 'a street pole with some signs sitting on top of it'. Reverse all words of length '6' in the given sentence.

SOLUTION: a teerts pole with some signs sitting on top of it

PROBLEM: Sentence: 'a young brown horse in a blue jacket running in a barn'. Reverse all words of length '4' in the given sentence.

SOLUTION: a young brown horse in a eulb jacket running in a nrab

PROBLEM: Sentence: 'audience at a circus taking pictures of an elephant'. Reverse all words of length '6' in the given sentence.

SOLUTION:
audience at a sucric gnikat pictures of an elephant