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.

Example Input: Sentence: 'a green apple and knife on dark wooden stairs'. Reverse all words of length '3' in the given sentence.
Example Output: a green apple dna knife on dark wooden stairs

Example Input: Sentence: 'a close up of the front of a train on train tracks'. Reverse all words of length '3' in the given sentence.
Example Output: a close up of eht front of a train on train tracks

Example Input: Sentence: 'a kitchen scene with an oven and a refrigerator'. Reverse all words of length '4' in the given sentence.
Example Output:
a kitchen scene htiw an nevo and a refrigerator