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.

Ex Input:
Sentence1: After failing at employment and education, Mike felt lost. Sentence2: He called his parents for help who told him to move back in. Sentence3: Mike's parents were very worried and decided to send him to therapy. Sentence4: Mike then began to see a psychiatrist a few times a week. Sentence5: After the therapy, Mike began to feel better in life.

Ex Output:
Mike, Mike's parents, Psychiatrist

Ex 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!

Ex Output:
Bonnie

Ex Input:
Sentence1: Abby had her first soccer game. Sentence2: She was nervous about playing. Sentence3: Her mom gave her a quick pep talk. Sentence4: During the game, Abbey scored a goal. Sentence5: From then on, she wasn't nervous about playing.

Ex Output:
Mom, Abby