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: Stacy was taking a spelling test. Sentence2: She was doing great. Sentence3: However, her pen ran out of ink. Sentence4: She didn't know what to do. Sentence5: She remembered the spare in her bag and finished the test.
Stacy