Definition: In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Input: Sentence1: The cop sat at his speed trap. Sentence2: A car came buy driving twenty miles over the speed limit. Sentence3: The cop chased the car. Sentence4: The car pulled over. Sentence5: The cop gave the owner a ticket for seven hundred dollars.
Output:
The cop, The owner