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 cat is playing with the bottom part of the umbrella'. Reverse all words of length '3' in the given sentence.
a tac is playing with eht bottom part of eht umbrella

Sentence: 'grown black cat sitting in a blue chair in a living room'. Reverse all words of length '4' in the given sentence.
grown black cat sitting in a eulb chair in a living moor

Sentence: 'a bus turning at an intersection and its raining'. Reverse all words of length '7' in the given sentence.

a bus gninrut at an intersection and its gniniar