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 secretary behind the actor believed the tourist .

Ex Output:
The tourist believed the actor .


Ex Input:
The lawyer contacted the author .

Ex Output:
The author contacted the lawyer .


Ex Input:
The senators stopped the students who called the presidents .

Ex Output:

The students stopped the senators .