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: 'wooden train passing through a forested hilly area'. Reverse all words of length '1' in the given sentence.
Example Output: wooden train passing through a forested hilly area

Example Input: Sentence: 'yachts are all tied up in a marina dock'. Reverse all words of length '3' in the given sentence.
Example Output: yachts era lla tied up in a marina dock

Example Input: Sentence: 'people climbing in to a light aircraft at a small airport'. Reverse all words of length '7' in the given sentence.
Example Output:
people climbing in to a light aircraft at a small tropria