Instructions: 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: Sentence1: August was running around the house, chasing his brother. Sentence2: At the same time, August was clutching a pair of scissors in his hand. Sentence3: August's mother soon caught them in the act. Sentence4: When she noticed the scissors, she became angry. Sentence5: August was sent to his room.
Output:
August, Mother