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: 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: Jennifer went out that morning to walk the dog. Sentence2: He was a very excitable labrador retriever. Sentence3: Jennifer did not see the bunny until it was too late. Sentence4: Fido bounded after it, while she raced to keep up. Sentence5: She was finally able to slow him down, and make him stop chasing it.

Ex Output:
Bunny, Jennifer

Ex Input:
Sentence1: Jena was cooking spaghetti for dinner. Sentence2: She went pick up the groceries from the store. Sentence3: The tomatoes appeared to be rotten. Sentence4: Jena picked up a jar of spaghetti sauce. Sentence5: She used pre made sauce instead of homemade.

Ex Output:
Jena