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 woman sitting at an outside patio table under a blue umbrella eating food'. Reverse all words of length '7' in the given sentence.
Example Output: a woman gnittis at an edistuo patio table under a blue umbrella eating food

Example Input: Sentence: 'a plate of two tacos with fillings and a side of orange slices'. Reverse all words of length '6' in the given sentence.
Example Output: a plate of two tacos with fillings and a side of egnaro secils

Example Input: Sentence: 'elephants are drinking water from a small pond'. Reverse all words of length '4' in the given sentence.
Example Output:
elephants are drinking water morf a small dnop