Definition: 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.
Input: Sentence1: I bought my dog a new bone. Sentence2: He seemed happy to get it. Sentence3: His tail wagged and he hopped around. Sentence4: He ate the bone for a long time. Sentence5: Then he hid it under his bed.
Output:
I (myself), Dog