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 backyard with a chair covered in snow'. Reverse all words of length '4' in the given sentence.
Example Output: a backyard htiw a chair covered in wons

Example Input: Sentence: 'the skier is doing a flip high in the air near gondala wires'. Reverse all words of length '3' in the given sentence.
Example Output: eht skier is doing a flip high in eht ria near gondala wires

Example Input: Sentence: 'the twin boys are looking at the black bear'. Reverse all words of length '5' in the given sentence.
Example Output:
the twin boys are looking at the kcalb bear