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.

Ex Input:
Sentence1: The monster truck driver eyed the ramp for his next stunt. Sentence2: He hit the gas and flew 30' in the air over a line of cars. Sentence3: The landing was rocky and so his truck went tumbling towards fans. Sentence4: Another driver blocked the fans but his truck to stop the other. Sentence5: The fans forgot the danger they were in and cheered like mad.

Ex Output:
Fans, Monster truck driver, Another driver

Ex Input:
Sentence1: Jim liked to watch sports, but never played. Sentence2: He mostly wished he was better at basketball. Sentence3: Jim's friends eventually encouraged him to join the basketball team. Sentence4: After lots of practice, Jim's skills increased. Sentence5: Now Jim is the best player on the team, and he feels accomplished.

Ex Output:
Jim, Jim's friends

Ex Input:
Sentence1: My friend bought a new motorcycle. Sentence2: He took it down a steep hill. Sentence3: He hit a bump that sent him flying. Sentence4: My friend fell on the ground with the motorcycle. Sentence5: He got back up like nothing ever happened.

Ex Output:
Friend