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: 'many cows on a field of grass with trees in the background'. Reverse all words of length '1' in the given sentence.

SOLUTION: many cows on a field of grass with trees in the background

PROBLEM: Sentence: 'a bunch off stuffed animals are on a car'. Reverse all words of length '7' in the given sentence.

SOLUTION: a bunch off deffuts slamina are on a car

PROBLEM: Sentence: 'a guy is stretching while holding a tennis racket'. Reverse all words of length '3' in the given sentence.

SOLUTION:
a yug is stretching while holding a tennis racket