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 single round bread object frying in oil'. Reverse all words of length '1' in the given sentence.
Example Output: a single round bread object frying in oil

Example Input: Sentence: 'a very small shiny metal cup with some food in it'. Reverse all words of length '4' in the given sentence.
Example Output:
a yrev small shiny metal cup htiw emos doof in it