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.

Example Input: Sentence1: Terry was going through a big issue. Sentence2: He started questioning everything around him. Sentence3: He started believing that he is the only one who exists. Sentence4: No matter how his friends and family tried to convince him he wasn't. Sentence5: He never would budge.
Example Output: Friends, Family, Terry

Example Input: Sentence1: Sean was in a bad mood. Sentence2: And he realized that his room was a mess. Sentence3: He decided to clean up and organize everything. Sentence4: And his room looked beautiful. Sentence5: And Sean was in a bad mood less often.
Example Output: Sean

Example Input: Sentence1: A cat ran around the room. Sentence2: He quickly tired from running. Sentence3: He curled up on the couch. Sentence4: The cat slept all afternoon. Sentence5: When he woke up, he was ready to run around again.
Example Output:
Cat