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 helped the secretary .
Example Output: The secretary helped the president .

Example Input: The tourists encouraged the authors who thanked the judges .
Example Output: The authors encouraged the the judges .

Example Input: The bankers by the presidents introduced the judge .
Example Output:
The presidents introduced the bankers .