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 man is standing on a sidewalk with his bike'. Reverse all words of length '3' in the given sentence.
Example Output: a nam is standing on a sidewalk with sih bike

Example Input: Sentence: 'a clock tower with a weather vein that is lit up'. Reverse all words of length '7' in the given sentence.
Example Output: a clock tower with a rehtaew vein that is lit up

Example Input: Sentence: 'three men playing frisbee outdoors in a field'. Reverse all words of length '7' in the given sentence.
Example Output:
three men gniyalp eebsirf outdoors in a field