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: 'the cox is standing behind the fence alone'. Reverse all words of length '2' in the given sentence.

Output: the cox si standing behind the fence alone


Input: Consider Input: Sentence: 'a laptop is sitting on a table with a bottle of coke'. Reverse all words of length '2' in the given sentence.

Output: a laptop si sitting no a table with a bottle fo coke


Input: Consider Input: Sentence: 'a person riding on the head of an elephant'. Reverse all words of length '1' in the given sentence.


Output: a person riding on the head of an elephant