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 athlete stopped the artist .
Example Output: The artist stopped the athlete .

Example Input: The doctors in front of the scientist recognized the banker .
Example Output: The scientist recognized the doctors .

Example Input: The professor believed the president .
Example Output:
The president believed the professor .