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 cat has is sticking its head in the toilet'. Reverse all words of length '8' in the given sentence.

SOLUTION: a cat has is gnikcits its head in the toilet

PROBLEM: Sentence: 'a couple walking in the rain using and umbrella'. Reverse all words of length '6' in the given sentence.

SOLUTION: a elpuoc walking in the rain using and umbrella

PROBLEM: Sentence: 'a person in the field playing with some kites'. Reverse all words of length '7' in the given sentence.

SOLUTION:
a person in the field gniyalp with some kites