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 man assisting a person on a horse on a race track'. Reverse all words of length '3' in the given sentence.
[EX A]: a nam assisting a person on a horse on a race track

[EX Q]: Sentence: 'a person that has their skis crossed in the air as they snow ski'. Reverse all words of length '4' in the given sentence.
[EX A]: a person taht has their siks crossed in the air as yeht wons ski

[EX Q]: Sentence: 'a dog looking at something inside the oven'. Reverse all words of length '7' in the given sentence.
[EX A]:
a dog gnikool at something inside the oven