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 small kid walks down a aisle with an umbrella in hand'. Reverse all words of length '8' in the given sentence.

SOLUTION: a small kid walks down a aisle with an allerbmu in hand

PROBLEM: Sentence: 'a hand holds a napkin with a doughnut as potatoes sit in the bathroom'. Reverse all words of length '1' in the given sentence.

SOLUTION: a hand holds a napkin with a doughnut as potatoes sit in the bathroom

PROBLEM: Sentence: 'there are people walking past a cow on a field'. Reverse all words of length '7' in the given sentence.

SOLUTION:
there are people gniklaw past a cow on a field