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: Every time I bit down on something I felt a sharp pain. Sentence2: I made an appointment with the dentist. Sentence3: He told me I needed to have my tooth removed. Sentence4: The tooth was pulled and I felt much better. Sentence5: The dentist told me to lay off of the sweets.
I (myself), Dentist