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.

Sentence1: Billy wanted a car. Sentence2: He tried to get a loan but they said he didn't make enough money. Sentence3: Billy couldn't get a better paying job because he didn't have a car. Sentence4: He saved for nine months, until he had enough money for a car. Sentence5: Now that he has a new car and a new job.
Billy

Sentence1: A group of five friends met at the local park. Sentence2: One brought a basketball. Sentence3: They all decided to play basketball. Sentence4: Everyone laughed and had fun. Sentence5: It was a fun day everyone remembers.
Five friends, Group, One

Sentence1: Evan wanted to teach his dog to do tricks. Sentence2: But no matter how many times he released commands, it didn't work. Sentence3: His dog just wouldn't listen! Sentence4: Then a friend suggested he reward the dog with treats when it obeyed. Sentence5: With positive reinforcement, Evan's dog was soon doing lots of tricks!
Evan's dog, A friend, Evan