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 tourists thanked the lawyer who the author saw .
The lawyer thanked the author .

The secretary behind the manager introduced the judges .
The judges introduced the manager .

The professor avoided the scientists in front of the lawyers .

The scientists avoided the professor .