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.
Q: Sentence1: Paul grew up in a well to do family but they didn't spoil him. Sentence2: Anytime Paul wanted something he had to earn it. Sentence3: When he was 16 he made shirts to sell so he could make money. Sentence4: Classmates liked his shirts and started buying some from him. Sentence5: He had so many sales that he opened a successful business at just 17.
A:
Paul, Well to do family, Classmates