Q: 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: I had just turned in my test. Sentence2: I knew I made an A. Sentence3: I could not wait for the grades to be posted. Sentence4: I got home and checked my score. Sentence5: The teacher had used the wrong key and gave me an F.
A:
I (myself), Teacher