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: Shane noticed that his beard was becoming long and unprofessional. Sentence2: He decided he should shave it. Sentence3: It was difficult to shave because it had grown so long. Sentence4: When he had finally shaved, Shane felt much better. Sentence5: Shane was glad to look better now that he had shaved.

Output: Shane

Input: Consider Input: Sentence1: I am Chinese. Sentence2: One day I was sitting on the bench in front of my building. Sentence3: A young man came by and said I looked like his father. Sentence4: He was white, however, as was his father. Sentence5: He said I just looked like his dad.

Output: I (myself), Young man

Input: Consider Input: Sentence1: Patrick wanted to earn money for a toy gun. Sentence2: He asked his mom for money. Sentence3: His mom told him to clean his room. Sentence4: Patrick went in his room and shoved all his toys under his bed. Sentence5: Patrick's mom gave him some money when she saw a clean room.
Output: Patrick, Mom