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.

Sentence: 'a bucket in a dingy looking cement walled bathroom'. Reverse all words of length '8' in the given sentence.
a bucket in a dingy looking cement walled moorhtab

Sentence: 'a skateboarder does a jump trick over a sewer hole'. Reverse all words of length '5' in the given sentence.
a skateboarder does a jump kcirt over a rewes hole

Sentence: 'a big group of people that are standing on a beach'. Reverse all words of length '5' in the given sentence.

a big puorg of people that are standing on a hcaeb