Given the task definition and input, reply with output. 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: Joe had heard that if spaghetti stuck to the wall it was cooked. Sentence2: He was making spaghetti himself for the first time. Sentence3: The first piece he threw against the wall didn't stick. Sentence4: It was eight pieces later before one stayed in place. Sentence5: When he tasted his spaghetti he found it perfectly cooked.
Joe