Detailed 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.
Q: Sentence1: Stan had just gotten a composite resin filling. Sentence2: His dentist had told him his days of biting into food were over. Sentence3: Stan listened as she explained how he was supposed to eat now. Sentence4: He needed to break the food with his hands and then chew it. Sentence5: Stan thought that was a bummer, but not as much as missing teeth!
A:
Stan, Dentist