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: Sue entered a nacho eating contest. Sentence2: Nachos are her favorite food so she thought she could do well. Sentence3: Sue started off slow to pace herself. Sentence4: She then upped the ante. Sentence5: Sue ate 15 pounds of nachos but did not win.

Ex Output:
Sue

Ex Input:
Sentence1: Roger is a secret agent. Sentence2: His watch has a grappling hook. Sentence3: He uses the watch to climb up a building. Sentence4: He steals important documents from a high profile target. Sentence5: Roger receives a promotion for his work.

Ex Output:
Roger, Target

Ex Input:
Sentence1: I came home from school. Sentence2: My mom asked me if I had a good day. Sentence3: At the same time, she noticed the tattoo on my leg. Sentence4: I tried to explain why I didn't tell her. Sentence5: She wasn't convinced and yelled at me.

Ex Output:
I (myself), Mom