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: 'the bicyclists race toward an old brick church'. Reverse all words of length '2' in the given sentence.

SOLUTION: the bicyclists race toward na old brick church

PROBLEM: Sentence: 'there are many animals standing on the top of this mountain'. Reverse all words of length '4' in the given sentence.

SOLUTION: there are ynam animals standing on the top of siht mountain

PROBLEM: Sentence: 'a man holding the strings of a kite on the ground'. Reverse all words of length '3' in the given sentence.

SOLUTION:
a nam holding eht strings of a kite on eht ground