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.

[EX Q]: Sentence: 'a tall clock tower with a sky background'. Reverse all words of length '10' in the given sentence.
[EX A]: a tall clock tower with a sky dnuorgkcab

[EX Q]: Sentence: 'a man walking a brown horse down a race track'. Reverse all words of length '4' in the given sentence.
[EX A]: a man walking a brown horse nwod a ecar track

[EX Q]: Sentence: 'a man holds up what looks like a donut'. Reverse all words of length '3' in the given sentence.
[EX A]:
a nam holds up what looks like a donut