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: Peter adopted a dog from the pound one day. Sentence2: He brought the dog home and fed it. Sentence3: He played with the dog and showed it a dog bed. Sentence4: He gave it a bone for a treat. Sentence5: The dog fell asleep, and Peter went to bed.
A:
Peter, A dog