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 young man is sitting on the side of a bus eating a hot dog'. Reverse all words of length '3' in the given sentence.

SOLUTION: a young nam is sitting on eht side of a sub eating a toh god

PROBLEM: Sentence: 'a grey clock tower with trees and wall below'. Reverse all words of length '5' in the given sentence.

SOLUTION: a grey kcolc rewot with seert and wall woleb

PROBLEM: Sentence: 'a family is eating a holiday meal in front of the fire'. Reverse all words of length '6' in the given sentence.

SOLUTION:
a ylimaf is gnitae a holiday meal in front of the fire