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: 'three people with backpacks on skies moving up a hill'. Reverse all words of length '9' in the given sentence.

SOLUTION: three people with skcapkcab on skies moving up a hill

PROBLEM: Sentence: 'there are two men sitting on a park bench'. Reverse all words of length '5' in the given sentence.

SOLUTION: ereht are two men sitting on a park hcneb

PROBLEM: Sentence: 'a man looks at a huge pile of green bananas'. Reverse all words of length '3' in the given sentence.

SOLUTION:
a nam looks at a huge pile of green bananas