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: 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: Pete the clown was such a happy clown. Sentence2: He loved to bring smiles to the people of the rodeo. Sentence3: One day his boss calls him into his office. Sentence4: He tells pete he has to let him go. Sentence5: Pete was a very depressed and sad clown now.
Example Output: Pete, Boss, People

Example Input: Sentence1: It was Halloween night. Sentence2: Tricia was handing out candy. Sentence3: All the sudden lightening struck. Sentence4: Tricia lost her power. Sentence5: She was beyond frightened.
Example Output:
Tricia