Given the task definition and input, reply with output. 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: Benny is fourteen years old. Sentence2: He wants to buy a video game but doesn't have enough money. Sentence3: He gets a job as a paper boy on his bike. Sentence4: He works for two weeks before he has enough to buy the game. Sentence5: He decides not to buy it and keep working to save more money!
Benny