You will be given a definition of a task first, then some input of the task.
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: Jan wanted to stop smoking. Sentence2: He tried support groups and pills but nothing worked. Sentence3: Jan realized he could travel to a place where there are no cigarettes. Sentence4: He applied for a Job in Antarctica as a researcher and he got the job. Sentence5: After six month in Antarctica, Jan no longer craved cigarettes.
Output:
Jan