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 that recognized the student stopped the artist .

Ex Output:
The artist stopped the student .


Ex Input:
The athletes next to the doctor encouraged the professors .

Ex Output:
The professors encouraged the athletes .


Ex Input:
The professor who helped the athletes introduced the secretaries .

Ex Output:

The secretaries introduced the professor .