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: 'some people sitting on some benches flowers and buildings'. Reverse all words of length '3' in the given sentence.
Example Output: some people sitting on some benches flowers dna buildings

Example Input: Sentence: 'the dog looks up at the cat sitting on a stone'. Reverse all words of length '1' in the given sentence.
Example Output: the dog looks up at the cat sitting on a stone

Example Input: Sentence: 'old destroyed toilets in grungy room with windows'. Reverse all words of length '7' in the given sentence.
Example Output:
old destroyed steliot in grungy room with swodniw