Detailed Instructions: 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.
Q: Sentence1: Jeff is addicted to working out and he goes everyday. Sentence2: He just started a new job that has him working long hours. Sentence3: These long hours prevent him from being able to go to the gym. Sentence4: By the time Jeff gets off work the gym is closed. Sentence5: Jeff went out and bought all the stuff he needs to work out athome.
A:
Jeff