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: When I was a toddler my dad would put me to bed. Sentence2: Before we said goodnight, he would read me a story. Sentence3: Eventually he let me read it out loud on my own. Sentence4: I went to school one day and showed my abilities. Sentence5: My teachers were astounded that I could read at so young.
I (myself), My teachers, My dad