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: Consider Input: Sentence1: The car did not want to start. Sentence2: The driver looked around. Sentence3: The driver checked the dashboard. Sentence4: A light was flashing. Sentence5: The car needed new oil.

Output: Car, Driver

Input: Consider Input: Sentence1: James had two best friends who hated each other. Sentence2: He could never see them together but always apart. Sentence3: For his birthday, he made an exemption and invited them both. Sentence4: It was a gamble, but it worked. Sentence5: The two friends went over their disagreement for the sake of James.

Output: James, Best friends

Input: Consider Input: Sentence1: One day the Zicker family went on vacation to New York. Sentence2: First they went to the Empire State Building. Sentence3: Then they walked around downtown. Sentence4: Then they went to Central Park. Sentence5: Finally they went to the Bronx Zoo.
Output: Zicker family