Instructions: 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: The store was running a special. Sentence2: It gave customers $5 off of any shoe purchase. Sentence3: The mom decided now was a good time to buy shoes for the family. Sentence4: They all got new sandals and tennis shoes. Sentence5: The mom was happy to have saved some money.
Output:
Customers, Mom, The family