In this task, you are given a premise sentence. Your task is to write a new sentence by substituting the subject and object (i.e., the input's subject should be output's object and vice versa.). The generated sentence must be fluent and shouldn't change the voice (i.e., passive or active) of the input.

Example Input: The scientist contacted the senator .
Example Output: The senator contacted the scientist .

Example Input: The scientists near the judge called the presidents .
Example Output: The presidents called the judge .

Example Input: The professor behind the athletes saw the author .
Example Output:
The athletes saw the professor .