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 student mentioned the doctor .

Ex Output:
The doctor mentioned the student .


Ex Input:
The judges admired the doctors .

Ex Output:
The doctors admired the judges .


Ex Input:
The professor stopped the presidents that introduced the tourists .

Ex Output:

The presidents stopped the the tourists .