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.

Ex Input:
The tourist called the doctor .

Ex Output:
The doctor called the tourist .


Ex Input:
The student contacted the artist who the tourists recommended .

Ex Output:
The artist contacted the tourists .


Ex Input:
The tourist helped the artist who supported the senator .

Ex Output:

The senator helped the tourist .