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: My wife used the vacuum cleaner today. Sentence2: It is very noisy. Sentence3: Our cat hates it. Sentence4: She hid under the bed for an hour after the vacuuming stopped. Sentence5: She slowly came out and is fine now.
Example Output: Our cat, My wife

Example Input: Sentence1: Hank was at his high school basketball match. Sentence2: During half time, someone from the other team offered him candy. Sentence3: Hank gladly accepted the candy. Sentence4: But he started feeling bad when the game resumed. Sentence5: Hank regret eating the candy.
Example Output: Hank, Someone

Example Input: Sentence1: Michael wanted to get a special Valentine's Gift for his wife. Sentence2: He went to the local jewelry store. Sentence3: The jeweler was happy to help him. Sentence4: The jeweler showed him many different options. Sentence5: Michael ended up picking a beautiful necklace.
Example Output:
Jewelry store, His wife, Michael, Jeweler