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: Jan's teacher assigned reading for homework. Sentence2: Jan forgot to read. Sentence3: When she got to class, her teacher gave a pop quiz. Sentence4: Jan failed the quiz. Sentence5: Her grade dropped by 2 points.
Jan, Jan's teacher