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 stop sign next to houses with christmas lights'. Reverse all words of length '4' in the given sentence.
Example Output: a pots ngis txen to houses htiw christmas lights

Example Input: Sentence: 'a man in a suit has a phone up to his face'. Reverse all words of length '1' in the given sentence.
Example Output: a man in a suit has a phone up to his face

Example Input: Sentence: 'a downtown city street at night with neon signs'. Reverse all words of length '6' in the given sentence.
Example Output:
a downtown city teerts at night with neon signs