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: Bob's bought a trailer that had a shingle roof. Sentence2: When it rained the roof would leak pretty badly. Sentence3: Bob checked his insurance policy to see if it was covered. Sentence4: The insurance replaced the shingle roof with a metal one. Sentence5: Bob's happy the rain doesn't leak into his house any more.

Ex Output:
Bob

Ex Input:
Sentence1: Kelli was injured on the job and couldn't work for a while. Sentence2: Because her bills continued to come in, she needed extra money. Sentence3: She joined a work-at-home site online to make some extra cash. Sentence4: Kelli really liked working on the site, and did a lot of hits. Sentence5: One morning she woke up to her first rejection and she felt crushed.

Ex Output:
Kelli

Ex Input:
Sentence1: Jordan took every AP Course possible. Sentence2: She excelled in each of the very difficult, time-consuming courses. Sentence3: One day, Jordan started to feel worn out. Sentence4: Unfortunately, she had over-committed herself. Sentence5: Jordan finished with A's thanks to her anxiety pills.

Ex Output:
Jordan