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: Luke got detention at school last week. Sentence2: He has to stay after school for an hour every day. Sentence3: Apparently he got into a fight with another kid. Sentence4: The other kid got detention too. Sentence5: They both learned that fighting just makes things worse.
Output:
Luke, Kid