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 bathroom with a white bath tub under a mirror'. Reverse all words of length '5' in the given sentence.

SOLUTION: a bathroom with a etihw bath tub rednu a mirror

PROBLEM: Sentence: 'a man holding a remote and standing up'. Reverse all words of length '3' in the given sentence.

SOLUTION: a nam holding a remote dna standing up

PROBLEM: Sentence: 'a man standing in a kitchen holding a bottle of ketchup and a hot dog'. Reverse all words of length '6' in the given sentence.

SOLUTION:
a man standing in a kitchen holding a elttob of ketchup and a hot dog