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 encouraged the actors .
The actors encouraged the president .

The tourist thanked the scientist .
The scientist thanked the tourist .

The secretaries avoided the tourists .

The tourists avoided the secretaries .