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: Dennis decides he wants more hours at work. Sentence2: He decides he doesn't want to ask his boss for more hours. Sentence3: So, instead he just dawdles at night before he clocks out. Sentence4: But his boss is taking notice and tells him to stop. Sentence5: Dennis decides to ask his boss for more hours.

Output: Dennis, Boss

Input: Consider Input: Sentence1: The kids were going out of the country for the first time. Sentence2: They applied for their passports. Sentence3: They were so excited when they arrived! Sentence4: THey couldn't wait to get their first stamp! Sentence5: The kids loved to travel.

Output: Kids

Input: Consider Input: Sentence1: Jane decided to go on a low calorie diet. Sentence2: She was constantly hungry at first. Sentence3: But over time, her body adjusted to her new diet. Sentence4: She was healthier and in a better mood. Sentence5: Jane was glad her hard work paid off.
Output: Jane