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: Larry was at a restaurant. Sentence2: He had called a cab to pick him up. Sentence3: It was getting to be almost an hour and no cab arrived. Sentence4: Larry called to ask what was up. Sentence5: It turned out that there was a mix up.

Output: Larry

Input: Consider Input: Sentence1: The family decided they would travel to Costa Rica. Sentence2: It was their dream to see monkeys and sloths! Sentence3: They planned the trip and were so excited. Sentence4: They spent a week exploring and watching nature. Sentence5: They took great photos and made great memories!

Output: Family

Input: Consider Input: Sentence1: Sally wanted to travel but she did not have money. Sentence2: She decided to do some research and get on a train. Sentence3: She found out the nearest freight train goes to cali. Sentence4: She planned it right and got on it. Sentence5: SHe then sees other people on it.
Output: Other people, Sally