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 artist contacted the judges .
Example Output: The judges contacted the artist .

Example Input: The manager introduced the senators who the artists mentioned .
Example Output: The senators introduced the manager .

Example Input: The doctors mentioned the president .
Example Output:
The president mentioned the doctors .