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 actor avoided the doctor .
Example Output: The doctor avoided the actor .

Example Input: The professors helped the doctor that the manager mentioned .
Example Output: The doctor helped the manager .

Example Input: The manager mentioned the doctor .
Example Output:
The doctor mentioned the manager .