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: Tom was at the beach. Sentence2: He found a bottle with a message in it. Sentence3: The message had a contact e-mail. Sentence4: Tom e-mailed it and actually got a response. Sentence5: It was a pretty fun experience for him.
Example Output: Tom

Example Input: Sentence1: I was going home when i decided to take a bus. Sentence2: I was alone so a woman asked me if she could sit with me. Sentence3: Then i let her sit beside me. Sentence4: When i woke up the woman was gone. Sentence5: My bag was opened so i checked my phone and it was gone too.
Example Output: I (myself), Woman

Example Input: Sentence1: Susie noticed a restaurant came to town. Sentence2: She was eager to try it. Sentence3: So her friends banded together to try. Sentence4: When they got there though the line was out the door. Sentence5: So they had to leave.
Example Output:
Friends, Susie