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 clock tower with a weather vein that is lit up'. Reverse all words of length '7' in the given sentence.

SOLUTION: a clock tower with a rehtaew vein that is lit up

PROBLEM: Sentence: 'an elephant is in a large field standing in the grass'. Reverse all words of length '1' in the given sentence.

SOLUTION: an elephant is in a large field standing in the grass

PROBLEM: Sentence: 'two zebras look out over a dry plain'. Reverse all words of length '1' in the given sentence.

SOLUTION:
two zebras look out over a dry plain