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.

Example Input: Sentence1: Tony decided to make lemonade the old-fashioned way. Sentence2: He brought out some lemons, water, and sugar. Sentence3: He squeezed the lemons until he thought his hands would fall off. Sentence4: He then added some water, and a generous amount of sugar. Sentence5: Tony tasted his lemonade and decided he wanted to be a chef someday.
Example Output: Tony

Example 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!
Example Output: Family

Example Input: Sentence1: Georgia had just finished up at a dentist appointment. Sentence2: Her mom offered to take her to lunch before school. Sentence3: Georgia wanted to go, but she couldn't eat for thirty minutes. Sentence4: Instead, her mom drove them around town until enough time passed. Sentence5: Then, they were able to eat lunch together.
Example Output:
Georgia, Her mom