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: I'm a big fan of pixel art. Sentence2: I express my fandom by making bead art of sprites. Sentence3: I melt the beads together so they fuse forever. Sentence4: It is a time-consuming but fun process. Sentence5: Now my walls are covered in bead-based pixel art.

Output: I (myself)

Input: Consider Input: Sentence1: Waiting for the next train to pull up, Harry was nervous. Sentence2: He was only a few hours away from his big interview. Sentence3: Spending the last three months sending out resumes, this was it. Sentence4: Boarding the train, he noticed something strange about the inside. Sentence5: He had hopped on the wrong color train, and would be late.

Output: Harry

Input: Consider Input: Sentence1: Lily was tired of her parents trying to pull out her loose tooth. Sentence2: But it wouldn't come out! Sentence3: Her brother suggested she chew bubble gum. Sentence4: Almost as soon as she started she felt a little tug. Sentence5: Her tooth had finally come out.
Output: Parents, Lily, Brother