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: Consider Input: Sentence1: Joe hungered for power. Sentence2: He did anything and stepped on everyone to get to the top. Sentence3: As he was good at his job, it worked. Sentence4: He became very famous and had a lot of money. Sentence5: Now that he has power, Joe doesn't know what to do with his time.

Output: Everyone, Joe

Input: Consider Input: Sentence1: I had a glass of water. Sentence2: I thought it tasted bland. Sentence3: I opened my refrigerator. Sentence4: I found a lemon in the door. Sentence5: I squeezed lemon into my water.

Output: I (myself)

Input: Consider 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