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 doctors contacted the authors .

Ex Output:
The authors contacted the doctors .


Ex Input:
The judge saw the senators by the author .

Ex Output:
The author saw the judge .


Ex Input:
The scientists helped the doctors in front of the authors .

Ex Output:

The doctors helped the authors .