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 managers by the lawyers contacted the scientists .
The scientists contacted the lawyers .

The scientist thanked the senators behind the doctors .
The doctors thanked the scientist .

The students saw the secretary in front of the professors .

The secretary saw the students .