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 large commuter bus stops at a bus stop'. Reverse all words of length '2' in the given sentence.
Example Output: a large commuter bus stops ta a bus stop

Example Input: Sentence: 'a laptop is sitting on a table with a bottle of coke'. Reverse all words of length '2' in the given sentence.
Example Output: a laptop si sitting no a table with a bottle fo coke

Example Input: Sentence: 'a black cow stands alone in a grassy field'. Reverse all words of length '3' in the given sentence.
Example Output:
a black woc stands alone in a grassy field