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: Shelly wanted to make a music video for his new song. Sentence2: He got some friends together and hired a host of extras. Sentence3: They danced on cars that they parked in a city. Sentence4: The video was a moderate success. Sentence5: Shelly saw a slight bump in downloads of his song.
Example Output: Extras, Friends, Shelly

Example Input: Sentence1: Jim's son is afraid to fly. Sentence2: He's seen too many stories about plane crashes. Sentence3: He can't sleep the night before they are set to fly to Denver. Sentence4: But by the time he gets on the plane he is exhausted. Sentence5: He is so tired that he sleeps all the way through the flight.
Example Output: Jim's son

Example Input: Sentence1: Gene was on a vacation in Vietnam. Sentence2: He began to walk down the streets to get food. Sentence3: He suddenly noticed a young man taking pictures of him. Sentence4: Gene called out for him to stop and chased after him. Sentence5: The man ran away and took off with the pictures.
Example Output:
Gene, A young man