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 senator helped the professors in front of the tourist .
Example Output: The professors helped the senator .

Example Input: The judges contacted the doctor that saw the bankers .
Example Output: The doctor contacted the judges .

Example Input: The tourists in front of the athlete introduced the secretary .
Example Output:
The secretary introduced the athlete .