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: 'an old chair with telephone books on it in a room with guitars and a tv'. Reverse all words of length '7' in the given sentence.
Example Output: an old chair with telephone books on it in a room with sratiug and a tv

Example Input: Sentence: 'a bucket in a dingy looking cement walled bathroom'. Reverse all words of length '8' in the given sentence.
Example Output: a bucket in a dingy looking cement walled moorhtab

Example Input: Sentence: 'the brown bear strolls through the wilderness surrounded by grass'. Reverse all words of length '5' in the given sentence.
Example Output:
the nworb bear strolls through the wilderness surrounded by ssarg