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: Bob loved to eat fat. Sentence2: His friends thought he ate too much. Sentence3: Indeed, the fat increased Bob's cholesterol intake dramatically. Sentence4: Bob's arteries were becoming clogged. Sentence5: After many years, Bob had a heart attack and died.

Output: Friends, Bob

Input: Consider Input: Sentence1: Terry spilled water on her keyboard. Sentence2: She was so upset. Sentence3: She unplugged it immediately and let it dry out for a day. Sentence4: When she plugged it back in, she was very nervous it would not work. Sentence5: Luckily, it worked!
Output: Terry