Detailed 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.
Q: Sentence1: Brett did not finish his homework after dinner. Sentence2: He had to finish it in the morning. Sentence3: His mom had to wake him up early. Sentence4: He was able to complete it in time to catch the bus. Sentence5: He went let that happen again.
A:
Mom, Brett