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 baby elephant in the middle of a field'. Reverse all words of length '3' in the given sentence.

SOLUTION: a baby elephant in eht middle of a field

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 broken blue umbrella lying on the street'. Reverse all words of length '3' in the given sentence.

SOLUTION:
a broken blue umbrella lying on eht street