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 with his aunt at an amusement park. Sentence2: They took a break from the rides to eat lunch. Sentence3: Jack filled up on pickles and lemonade. Sentence4: His aunt wanted to walk around but he wanted to the rides. Sentence5: On the first ride after lunch Jack vomited all over his aunt.
Aunt, Jack