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.

Input: Consider Input: Sentence1: Joe imagined getting rich by finding a priceless pearl. Sentence2: He took his boat to an oyster bed and started looking. Sentence3: He tossed the oysters aside when he found no pearls inside. Sentence4: Hours later, Joe had nothing to show for his troubles. Sentence5: His stomach grumbled and Joe thought of the wasted oysters.

Output: Joe

Input: Consider Input: Sentence1: Oswald sold oranges on the side of the road. Sentence2: He loved his job and he didn't care that he hardly made any money. Sentence3: Oswald loved oranges. Sentence4: His favorite part was seeing how happy his oranges made people. Sentence5: At the end of the day he would count smiles not money.

Output: Oswald, People

Input: Consider Input: Sentence1: When I was 12 years old, I met a boy who was 19. Sentence2: We started dating behind my parents' back. Sentence3: When they found out I had a boyfriend with a car, they were angry. Sentence4: They told me I could never seen him again. Sentence5: I never dated him after that, but sneaked out to see him one last time.
Output: I (myself), Boy, Parents