Definition: 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: Sentence1: Alice put out her cigarette on the oven mitt. Sentence2: She tossed it on the counter next to the stack of mail. Sentence3: Her family sat down to eat the Thanksgiving dinner. Sentence4: Alice suddenly smelled smoke wafting across the room. Sentence5: Her cigarette had started the kitchen on fire!
Output:
Alice, Family