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: I packed the family in the car and headed to the grocery store. Sentence2: I forgot my credit card at home, and didn't have any cash on me. Sentence3: We filled an entire cart with the food we needed for the week. Sentence4: We got to the register and couldn't pay. Sentence5: It was very embarrassing.
Example Output: I (myself), Family

Example Input: Sentence1: Ava needed a root canal badly- she was always in pain. Sentence2: But she was terrified of dentists! Sentence3: Finally the agony drove her to make an appointment. Sentence4: The dentist was very kind when she arrived, and put her at ease. Sentence5: And to her shock, the root canal didn't hurt one bit!
Example Output: Dentist, Dentists, Ava

Example Input: Sentence1: I hardly ever get to jump on a trampoline. Sentence2: Yesterday, my family went to our cousin's house for a party. Sentence3: They had a trampoline. Sentence4: I jumped on the trampoline the whole time. Sentence5: I can't wait for the next time I can use a trampoline!
Example Output:
I (myself), Cousin, Family