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.

Ex Input:
Sentence1: Jim got a brand new car. Sentence2: He had purchased the car off of his neighbor. Sentence3: The car needed an oil change. Sentence4: Jim took his car to the mechanic. Sentence5: After the oil change, his car ran like brand new.

Ex Output:
Jim, Mechanic, Neighbor

Ex Input:
Sentence1: Alexa loves photography. Sentence2: She went to college for photography. Sentence3: She spent all her free time taking photos. Sentence4: Alexa's parents decided to buy her a camera as a graduation gift. Sentence5: Alexa loves her new camera and takes pictures with it daily.

Ex Output:
Alexa's parents, Alexa

Ex Input:
Sentence1: Ace was a cable installer. Sentence2: He had a few installations setup for today. Sentence3: Ace knocks on the front door of his first stop. Sentence4: A sweet old lady answers the door. Sentence5: Ace installs her cable and is very nice to the older lady.

Ex Output:
Old lady, Ace