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 author saw the actor .
Example Output: The actor saw the author .

Example Input: The banker encouraged the scientist .
Example Output: The scientist encouraged the banker .

Example Input: The senators stopped the students .
Example Output:
The students stopped the senators .