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 birthday cake cut in different pieces sitting on a tray at a table'. Reverse all words of length '1' in the given sentence.
Example Output: a birthday cake cut in different pieces sitting on a tray at a table

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: 'cars in a city street stopped in traffic'. Reverse all words of length '4' in the given sentence.
Example Output:
srac in a ytic street stopped in traffic