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: Dean decided he was going to prank his principle. Sentence2: He took a carton of eggs from his fridge and headed out. Sentence3: He arrived at his principal's house a little after midnight. Sentence4: After throwing two eggs his principle came outside. Sentence5: He was forced to clean up the mess and serve detention for a month.
Dean, Principal

Sentence1: Thomas went out with his friends on Halloween. Sentence2: They decided to look for ghosts. Sentence3: It was dark and spooky, and Thomas wasn't sure he wanted to go. Sentence4: They did not find a single ghost! Sentence5: Still, he was glad to have spent time with his friends.
Thomas, Friends

Sentence1: When I was younger, I was lactose intolerant. Sentence2: Everyday at school lunch, students had to take milk. Sentence3: My mom gave me a note that said I could bring my own water. Sentence4: One day I forgot my note and had to drink milk. Sentence5: As a result, I threw up all over my chicken nuggets.
I (myself), Students, Mom