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: Our family had a collection of Beanie Babies. Sentence2: A friend was supposed to sell a few of them at a yard sale. Sentence3: My brother in particular had several of them. Sentence4: One of his sold for twenty dollars! Sentence5: It must have cost about a dollar to make.

Output: Our family, My brother, Friend

Input: Consider Input: Sentence1: Laura wanted to play the harp. Sentence2: She signed up for lessons in school. Sentence3: At first it was very difficult to learn. Sentence4: But soon she was playing wonderfully. Sentence5: She played so well, she got a solo in the school concert!

Output: Laura

Input: Consider Input: Sentence1: James got permission to use the office printer for personal business. Sentence2: He printed up a stack of flyers for his band's gig on Saturday. Sentence3: Sly, another of the workers, had once dreamed of being in a band. Sentence4: Mad he never made it, he complained about James using the printer. Sentence5: The boss told him to mind his own business and get back to work.
Output: The boss, James, Sly