Given the task definition and input, reply with output. 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: Todd used to be a professional football coach. Sentence2: He loved the job but got fired after fighting a referee. Sentence3: He didn't agree with a call and started yelling. Sentence4: He advanced on the referee and threw a punch. Sentence5: Now Todd is sitting in a jail cell for the night.
Referee, Todd