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: Mike has an English final the next morning. Sentence2: During the college semester, Mike never attended the English class. Sentence3: Mike stays up all night studying for the final. Sentence4: The next morning, Mike takes the test on no sleep. Sentence5: Mike receives a B minus on the final.
Output:
Mike