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.

The manager saw the scientists .
The scientists saw the manager .

The artists in front of the student thanked the manager .
The manager thanked the student .

The doctors called the author .

The author called the doctors .