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 black and white image of a wall with a stop sign on it'. Reverse all words of length '5' in the given sentence.
Example Output: a kcalb and etihw egami of a wall with a stop sign on it

Example Input: Sentence: 'giraffes are standing in the grass near water and trees'. Reverse all words of length '4' in the given sentence.
Example Output: giraffes are standing in the grass raen water and trees

Example Input: Sentence: 'a small red and white single propeller plane flies near snow covered mountains'. Reverse all words of length '3' in the given sentence.
Example Output:
a small der dna white single propeller plane flies near snow covered mountains