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: Kerry enjoyed playing games on her smartphone. Sentence2: She mostly played free games that made revenue through ads. Sentence3: One day her favorite game had a major update. Sentence4: The new version had many more ads which were more intrusive in nature. Sentence5: Kerry's interest the game waned.

Output: Kerry

Input: Consider Input: Sentence1: Daniel was playing a game of cards. Sentence2: He had bet all of his money on this hand. Sentence3: Daniel was sweating nervously. Sentence4: Daniel revealed his hand. Sentence5: Daniel won the game.

Output: Daniel

Input: Consider Input: Sentence1: Mary had just moved and was going to a new school. Sentence2: The new year was about to begin and Mary met with her teachers. Sentence3: Her English teacher let her know that she needed to read a book. Sentence4: Mary spent the next two days speed reading the book. Sentence5: On the first day of school, she was ready to participate in the work.
Output: English teacher, Mary, Teachers