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: 'an elephant is standing in the road by the truck'. Reverse all words of length '5' in the given sentence.

SOLUTION: an elephant is standing in the road by the kcurt

PROBLEM: Sentence: 'a snowy hill with a tree lined area'. Reverse all words of length '4' in the given sentence.

SOLUTION: a snowy llih htiw a eert lined aera

PROBLEM: Sentence: 'a cat is playing with the bottom part of the umbrella'. Reverse all words of length '3' in the given sentence.

SOLUTION:
a tac is playing with eht bottom part of eht umbrella