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 herd of zebra standing in a forest'. Reverse all words of length '1' in the given sentence.
Example Output: a herd of zebra standing in a forest

Example Input: Sentence: 'a bus with lots of big tires sitting parked on a street'. Reverse all words of length '6' in the given sentence.
Example Output: a bus with lots of big tires sitting dekrap on a teerts

Example Input: Sentence: 'a blood covered woman inspects herself in a mirror'. Reverse all words of length '7' in the given sentence.
Example Output:
a blood derevoc woman inspects flesreh in a mirror