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: Evelyn and Robert moved into a new home. Sentence2: Evelyn bought a few houseplants to liven up the place. Sentence3: Then a friend who was moving away gifted Evelyn some of his plants. Sentence4: Soon, everyone thought Evelyn was a plant fanatic. Sentence5: Now, everyone gives Evelyn house plants as gifts.
Example Output: Evelyn, Robert, A friend, Everyone

Example Input: Sentence1: Brent was an engineer. Sentence2: Brent had a hobby of making soap. Sentence3: He decided to sell his soap for money. Sentence4: He was wildly successful and went into the soap business. Sentence5: Brent had a great career in the soap business.
Example Output: Brent

Example Input: Sentence1: Shannon had a lot of pets. Sentence2: One cat in particular shed a lot. Sentence3: She was tired to sweeping up fur. Sentence4: One day, she discovered a huge fur ball on the floor. Sentence5: She snapped and shaved the cat!
Example Output:
Pets, Shannon, Cat