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 man and woman standing with luggage in a waiting area'. Reverse all words of length '7' in the given sentence.

SOLUTION: a man and woman standing with egaggul in a gnitiaw area

PROBLEM: Sentence: 'a man on skis is under an empty ski lift'. Reverse all words of length '1' in the given sentence.

SOLUTION: a man on skis is under an empty ski lift

PROBLEM: Sentence: 'group of officers in uniform riding horses in front of a crowd'. Reverse all words of length '7' in the given sentence.

SOLUTION:
group of officers in mrofinu riding horses in front of a crowd