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: She had been waking up every morning sick. Sentence2: She knew this was not normal. Sentence3: She went to the doctor to get things checked out. Sentence4: The results were confirmed. Sentence5: She was pregnant.

Output: Doctor

Input: Consider Input: Sentence1: Roger is a secret agent. Sentence2: His watch has a grappling hook. Sentence3: He uses the watch to climb up a building. Sentence4: He steals important documents from a high profile target. Sentence5: Roger receives a promotion for his work.

Output: Roger, Target

Input: Consider Input: Sentence1: Roger liked to work on his car. Sentence2: He planned on completely rebuilding his car for a show. Sentence3: He finished his car and had it running. Sentence4: Roger entered the car into the car show. Sentence5: All the enthusiasts loved his car.
Output: The enthusiasts, Roger