You will be given a definition of a task first, then some input of the task.
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: A new store was opening and they were offering a promotion. Sentence2: The first fifty people in line would win a free tee shirt. Sentence3: Andrew really wanted one so he had staked a place in line early. Sentence4: He waited for three hours at least. Sentence5: Luckily, he was fifteenth in line and did get the free shirt!
Output:
Andrew, Store, Fifty people