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.

Ex Input:
The author contacted the actors who believed the lawyers .

Ex Output:
The lawyers contacted the author .


Ex Input:
The professors who the secretary contacted recognized the scientists .

Ex Output:
The scientists recognized the professors .


Ex Input:
The doctors called the authors .

Ex Output:

The authors called the doctors .