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: 'three planes being serviced at the airport on a sunny day'. Reverse all words of length '2' in the given sentence.

SOLUTION: three planes being serviced ta the airport no a sunny day

PROBLEM: Sentence: 'a propeller plane sits parked inside of a building'. Reverse all words of length '8' in the given sentence.

SOLUTION: a propeller plane sits parked inside of a gnidliub

PROBLEM: Sentence: 'an elephant munches on a trunk full of fresh grass'. Reverse all words of length '7' in the given sentence.

SOLUTION:
an elephant sehcnum on a trunk full of fresh grass