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 standing next to a parked car under a street sign'. Reverse all words of length '6' in the given sentence.

SOLUTION: a man standing next to a dekrap car under a teerts sign

PROBLEM: Sentence: 'a meal consisting of greens rice meat in sauce and banana'. Reverse all words of length '4' in the given sentence.

SOLUTION: a laem consisting of greens ecir taem in sauce and banana

PROBLEM: Sentence: 'a man running while holding a frisbee'. Reverse all words of length '7' in the given sentence.

SOLUTION:
a man gninnur while gnidloh a eebsirf