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 street pole with some signs sitting on top of it'. Reverse all words of length '6' in the given sentence.
Example Output: a teerts pole with some signs sitting on top of it

Example Input: Sentence: 'a line of buses waiting to take passengers where they need to go'. Reverse all words of length '2' in the given sentence.
Example Output: a line fo buses waiting ot take passengers where they need ot og

Example Input: Sentence: 'a group of young women in tennis wear'. Reverse all words of length '6' in the given sentence.
Example Output:
a group of young women in sinnet wear