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 child is inside standing on a skateboard'. Reverse all words of length '6' in the given sentence.

SOLUTION: a child is edisni standing on a skateboard

PROBLEM: Sentence: 'a vase of flowers sitting near a candle on a sink'. Reverse all words of length '6' in the given sentence.

SOLUTION: a vase of flowers sitting near a eldnac on a sink

PROBLEM: Sentence: 'a group of men standing around a parked subway train'. Reverse all words of length '8' in the given sentence.

SOLUTION:
a group of men gnidnats around a parked subway train