Q: 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.
Sentence1: Betty went out of her way to be a good employee. Sentence2: She tirelessly helped customers day in and day out. Sentence3: One day her supervisor came to her and fired her. Sentence4: Betty was so upset she took her 401k and cashed out. Sentence5: Betty bought out her old employer and fired her old boss.
A:
Customers, Her supervisor, Betty