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 alarm clock sitting with other objects in a window sill'. Reverse all words of length '5' in the given sentence.

SOLUTION: an mrala kcolc sitting with rehto objects in a window sill

PROBLEM: Sentence: 'a person jumping up into the air on a skateboard'. Reverse all words of length '1' in the given sentence.

SOLUTION: a person jumping up into the air on a skateboard

PROBLEM: Sentence: 'a zebra is grazing in the grass near some trees'. Reverse all words of length '3' in the given sentence.

SOLUTION:
a zebra is grazing in eht grass near some trees