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 president saw the senators who the professors encouraged .

Ex Output:
The senators saw the president .


Ex Input:
The actor avoided the doctor .

Ex Output:
The doctor avoided the actor .


Ex Input:
The actor stopped the doctors in front of the professor .

Ex Output:

The doctors stopped the actor .