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: Aurelia has been trying to find a hobby for months. Sentence2: Finally a friend recommends that Aurelia try knitting. Sentence3: Aurelia begins by knitting a green sweater. Sentence4: She finds knitting a relaxing way to forget her problems. Sentence5: Aurelia is very happy that she found a good hobby.

Ex Output:
Friend, Aurelia

Ex Input:
Sentence1: Amy loved The Babysitters Club books when in elementary school. Sentence2: When she was 17 they made a movie. Sentence3: A friend suggested she see it. Sentence4: Amy felt she was way too adult to see that movie. Sentence5: At the theater she decided to see a Pg13 movie instead.

Ex Output:
Amy, Friend

Ex Input:
Sentence1: Edna had bought some bread. Sentence2: She hadn't eaten any bread since she bought it. Sentence3: The bread was starting to get stale. Sentence4: She didn't want the bread to go to waste. Sentence5: Edna made a bread pudding.

Ex Output:
Edna