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.

Example Input: Sentence1: Donna wanted to remodel the kitchen. Sentence2: The appliances were old and outdated. Sentence3: She wanted more modern energy efficient appliances. Sentence4: Her husband thought it was a good idea. Sentence5: Donna got the new appliances and flooring.
Example Output: Donna's husband, Donna

Example 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.
Example Output: Doctor

Example Input: Sentence1: Chris, a true cowboy, was going to a local bull riding championship. Sentence2: While sitting up front, a bull with a rider rages towards him. Sentence3: It slams into the fencing, throwing its rider high into the air. Sentence4: The rider's hat goes flying and Chris manages to catch it. Sentence5: This is the most exciting bull riding event he has ever been to.
Example Output:
Chris