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: 'decorative street signs on a post in front of trees'. Reverse all words of length '10' in the given sentence.
Example Output: evitaroced street signs on a post in front of trees

Example Input: Sentence: 'the image shows the screen of a cell phone homepage'. Reverse all words of length '2' in the given sentence.
Example Output: the image shows the screen fo a cell phone homepage

Example Input: Sentence: 'a busy scene in an open air market'. Reverse all words of length '6' in the given sentence.
Example Output:
a busy scene in an open air tekram