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: Bill really loved to bowl. Sentence2: Everyday he would go to the local bowling alley to bowl. Sentence3: One day he was asked to join the Pro Bowlers Association. Sentence4: He won many tournaments. Sentence5: After he retired he made it to the Pro Bowlers Hall of Fame.
Bill