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 professors believed the managers .
Example Output: The managers believed the professors .

Example Input: The tourists avoided the athlete near the doctor .
Example Output: The athlete avoided the doctor .

Example Input: The doctor who believed the presidents encouraged the author .
Example Output:
The author encouraged the presidents .