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 president behind the lawyers thanked the actor .
The actor thanked the lawyers .

The secretaries that the judges believed encouraged the doctor .
The doctor encouraged the secretaries .

The president who saw the managers introduced the judges .

The judges introduced the president .