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: Allie had rich parents. Sentence2: They decided to buy a plane. Sentence3: Allie was excited. Sentence4: Her parents got a deal. Sentence5: They used it right away.

Output: Parents, Allie

Input: Consider Input: Sentence1: Casey was a secretary at a leasing office. Sentence2: There was a new hire, Savannah, whom Casey quickly became friends with Sentence3: Until the day Casey was running about one hour late to work. Sentence4: Savannah called the boss to tell on Casey. Sentence5: Casey and Savannah are not friends anymore.

Output: Casey, Savannah, Boss

Input: Consider Input: Sentence1: Tom ordered chicken with pasta at a local restaurant. Sentence2: The chef added a lot of jerk seasoning into the plate. Sentence3: Tom's stomach began to upset him when he ate. Sentence4: Eventually, the pain became unbearable. Sentence5: He went to the bathroom since he had diarrhea.
Output: The chef, Tom