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: Amy was very excited because it was the day of her wedding. Sentence2: Her parents were going to fly in from another country. Sentence3: Amy was worried because their flight was already delayed. Sentence4: In the end they were not able to make it on that day. Sentence5: Amy had to postpone her wedding until the next day.

Output: Amy, Parents

Input: Consider Input: Sentence1: Bonnie had been hiking all day. Sentence2: She went home to take a shower. Sentence3: She couldn't wait to get all the dirt off of her. Sentence4: She turned the knob but nothing happened. Sentence5: The water had been shut off!

Output: Bonnie

Input: Consider Input: Sentence1: Tim's goldfish died. Sentence2: His parents didn't want to tell him. Sentence3: They went out and bought another one. Sentence4: They replaced it without Tim knowing. Sentence5: He never knew the truth.
Output: His parents, Tim, Another one, Tim's goldfish