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: Jack was auditioning for a reality show. Sentence2: He was in the waiting room with some other auditioners. Sentence3: Suddenly, a fight broke out between some of the guys. Sentence4: Jack became involved in the fight. Sentence5: When the producer found out Jack was immediately asked to leave.
Other auditioners, Some guys, Jack, The producer