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: 'two giraffes with beautiful markings are shown from behind'. Reverse all words of length '8' in the given sentence.
Example Output: two seffarig with beautiful sgnikram are shown from behind

Example Input: Sentence: 'a woman sitting at a table eating food'. Reverse all words of length '4' in the given sentence.
Example Output: a woman sitting at a table eating doof

Example Input: Sentence: 'a rusty old tug boat moored at a dock'. Reverse all words of length '6' in the given sentence.
Example Output:
a rusty old tug boat deroom at a dock