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.

Example Input: Sentence1: My husband has decided he wants to be a stay at home dad. Sentence2: We don't have any kids. Sentence3: All we have is two cats. Sentence4: He plays with them all day and calls them Laurel and Hardy. Sentence5: I can't believe I married this man.
Example Output: Dad, My husband, I (myself)

Example Input: Sentence1: Simon invited his friend Joey over for a play-date. Sentence2: He was looking forward to playing Minecraft with his friend. Sentence3: Right before Joey arrived, the internet went out. Sentence4: Simon tried resetting the router, but it didn't help. Sentence5: Simon and Joey played outside until the router was back online.
Example Output: Simon, Joey

Example Input: Sentence1: I am a movie fan and wanted to know more about film. Sentence2: I read one book on the history of film. Sentence3: As it was too short, I read another one this week. Sentence4: The book mentioned important films in history. Sentence5: After I read the book I began watching films listed in the book.
Example Output:
I (myself)