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 president called the secretary that helped the scientist .
Example Output: The scientist called the president .

Example Input: The senators in front of the scientist believed the manager .
Example Output: The manager believed the scientist .

Example Input: The scientists saw the author that the senators avoided .
Example Output:
The author saw the senators .