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.

Input: Consider Input: Sentence1: Tom ran for a local election. Sentence2: He was running as a protest candidate. Sentence3: The two main candidates were brought down by scandals. Sentence4: There wasn't enough time to replace them. Sentence5: Tom wound up winning the election.

Output: Two main candidates, Tom

Input: Consider 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.

Output: Shawn, His boss

Input: Consider Input: Sentence1: Karin and Rory were vegans. Sentence2: They got into a discussion with Alex, who is not a vegan. Sentence3: They debated for a long time, but could not agree. Sentence4: They decided to agree to disagree. Sentence5: It was important to them to respect each other, despite disagreeing.
Output: Rory, Alex, Karin