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.

Input: Consider Input: Sentence: 'a group of sheep graze in a grassy field'. Reverse all words of length '2' in the given sentence.

Output: a group fo sheep graze ni a grassy field


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

Output: the image shows the screen fo a cell phone homepage


Input: Consider Input: Sentence: 'a living room with a couch and a coffee table'. Reverse all words of length '3' in the given sentence.


Output: a living room with a couch dna a coffee table