You will be given a definition of a task first, then some input of the task.
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.

Sentence1: Charles had always been the best pool player in his group of friends Sentence2: One day, a new person appeared and challenged Charles to a game Sentence3: They had a good game, but Charles lost in the end Sentence4: He realized that he didn't always have to be so competitive Sentence5: He became a better friend to his friends, and a better person
Output:
Charles, Friends, New person