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: Tom was in a hurry to get to work. Sentence2: He didn't have enough time to match his socks. Sentence3: At the office his co-workers made fun of him. Sentence4: His boss questioned his attire as well. Sentence5: Tom never made that mistake again.

Output: Boss, Co-workers, Tom

Input: Consider Input: Sentence1: Samantha was going out for the night. Sentence2: She needed to withdraw money. Sentence3: She went to the atm and inserted her card. Sentence4: The atm displayed an error message! Sentence5: Sam drove to the grocery store and was able to get cash back instead.

Output: Samantha

Input: Consider Input: Sentence1: Laby cocked her gun and prepared to enter the house. Sentence2: She heard a noise inside and approached cautiously. Sentence3: She saw a flash as someone ran past the door. Sentence4: She ran in yelling police and to stop running. Sentence5: She saw a man standing with his hands in the air shaking.
Output: Laby, Man