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: 'an umbrella sitting on top of a hill next to a body of water'. Reverse all words of length '4' in the given sentence.
[EX A]: an umbrella sitting on top of a llih txen to a ydob of water

[EX Q]: Sentence: 'a young boy plays with a phone sitting on the ground'. Reverse all words of length '6' in the given sentence.
[EX A]: a young boy plays with a phone sitting on the dnuorg

[EX Q]: Sentence: 'these dogs dont look all that happy to be surfing'. Reverse all words of length '7' in the given sentence.
[EX A]:
these dogs dont look all that happy to be gnifrus