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: A friend of ours told us to watch a show called Blippy. Sentence2: It is this odd show on Youtube. Sentence3: It is nothing special, just a show aimed for kids. Sentence4: It made me think I can maybe create a show. Sentence5: I should really think about doing that and making a ton of money.

Ex Output:
I (myself), Ours, Kids, Friend

Ex Input:
Sentence1: Shawn wanted to get a promotion at work. Sentence2: He decided to take night classes to get certifications. Sentence3: He took online classes 3 days a week. Sentence4: When he got his certification he asked his boss for a raise. Sentence5: His boss agreed to the raise.

Ex Output:
Shawn, His boss

Ex Input:
Sentence1: Denise was a gymnast. Sentence2: One day after class, she saw that all of her belongings were gone. Sentence3: She searched the entire gym for her things. Sentence4: Finally, some girl's little sister admitted that she had done it. Sentence5: She gave Denise back her stuff and apologized.

Ex Output:
Denise, Little sister