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: Tim was late for work in the morning. Sentence2: He was multi-tasking while driving. Sentence3: He hadn't been able to eat breakfast. Sentence4: He was trying to eat cereal when he crashed. Sentence5: He was decapitated instantly.

Output: Tim

Input: Consider Input: Sentence1: Sally wanted to be a court stenographer. Sentence2: She bought the recording equipment. Sentence3: She took a college course for a license. Sentence4: Finally she was qualified to be a stenographer. Sentence5: But there were no openings in the nearby courts at that time.

Output: Sally, Courts

Input: Consider Input: Sentence1: Lilly had a nightmare that her Dad came home with a hole in his chest. Sentence2: She couldn't go back to sleep because it scared her so bad. Sentence3: The next morning she told her mom about the dream but mom laughed. Sentence4: She was embarrassed to tell her dad about how scared she was. Sentence5: Finally she told him and he just hugged her and told her he loved her.
Output: Mom, Lilly, Dad