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 behind the doctors called the secretary .
Example Output: The secretary called the president .

Example Input: The banker mentioned the senator behind the manager .
Example Output: The senator mentioned the manager .

Example Input: The student encouraged the senator .
Example Output:
The senator encouraged the student .