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: 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.

Ex Output:
Jim's son

Ex Input:
Sentence1: Tom was at the beach with friends. Sentence2: He had too much fun and forgot to put sunscreen on. Sentence3: Within hours someone pointed out how red he was. Sentence4: Tom was severely sunburned. Sentence5: He had to leave and get special healing lotion.

Ex Output:
Friends, Someone, Tom

Ex Input:
Sentence1: Joey was playing in his room with his toys. Sentence2: He needed something in his closet so he went to open the door. Sentence3: The door, a sliding mirror, got jammed suddenly. Sentence4: Joey pushed on it which made it fall. Sentence5: The door fell to the ground but luckily it didn't hit Joey.

Ex Output:
Joey