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.

Input: Consider Input: Sentence1: I listened to the morning weather report on TV. Sentence2: A big snowstorm was headed my way. Sentence3: I called into work and was told that the company was not opening. Sentence4: I dressed in my winter outdoor gear as the snow began to fall. Sentence5: I spent the rest of the day shoveling.

Output: I (myself)

Input: Consider Input: Sentence1: Tom was walking home. Sentence2: A small cat started following him. Sentence3: Tom thought the cat was cute. Sentence4: It followed him all the way home. Sentence5: Tom eventually took it in.

Output: Cat, Tom

Input: Consider Input: Sentence1: Mama's Restaurant is the most popular restaurant on Maui. Sentence2: Bill had to make reservations weeks before his Hawaii trip. Sentence3: He looked up the restaurant on the internet and read about it. Sentence4: He found that people in the know did not order a Mai Tai. Sentence5: They order a Black Tai and get a better drink.
Output: Bill, People