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: Beth was putting her items in her locker at the gym. Sentence2: She looked around and couldn't find her lock. Sentence3: She decided to leave. Sentence4: She returned the next day with her new lock. Sentence5: There she found her lock sitting on the floor of her locker.
Output:
Beth