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: My mother and I were hit by lightning. Sentence2: We both had just gotten into the car. Sentence3: The entire car shook for a few seconds and all the window lit up. Sentence4: We both couldn't believe it and looked at each other. Sentence5: Then we drove away.
Example Output: I (myself), My mother

Example Input: Sentence1: Jeff is addicted to working out and he goes everyday. Sentence2: He just started a new job that has him working long hours. Sentence3: These long hours prevent him from being able to go to the gym. Sentence4: By the time Jeff gets off work the gym is closed. Sentence5: Jeff went out and bought all the stuff he needs to work out athome.
Example Output: Jeff

Example Input: Sentence1: Saul wants to go hunting. Sentence2: His father is planning a trip for him. Sentence3: Saul has no clue he is going hunting. Sentence4: The trip is planned on his birthday, which is on Monday. Sentence5: Saul is excited when he finds out what his hunting trip is.
Example Output:
Father, Saul