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: Kate was sipping on orange soda and sketching in her sketch book. Sentence2: Her brother and his friend came in the room. Sentence3: They were throwing a football around. Sentence4: It landed and knocked over Kate's soda. Sentence5: The orange soda ruined Kate's drawing.

Output: Kate, Friend, Brother

Input: Consider Input: Sentence1: Warren didn't like beets and told his mom repeatedly. Sentence2: But as she never listened, he had some on his plate for dinner. Sentence3: He tried to give them to his dog. Sentence4: The dog sniffed them and walked away. Sentence5: Warren refused to eat the beets as his dog didn't want them either.

Output: Dog, Mom, Warren

Input: Consider Input: Sentence1: Florence loved to sing. Sentence2: She would sing in the car, in the shower, and with her family. Sentence3: However, everyone thought Florence was a bad singer. Sentence4: Often, listeners' ears would hurt afterwards. Sentence5: However, everyone was too polite to say anything.
Output: Florence family, Florence