Definition: 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.
Input: Sentence1: It was a nice winter day, and Jan needed something to do. Sentence2: She looked outside and saw that the pond was frozen. Sentence3: She grabbed her ice skates and went outside. Sentence4: She laced up her skates and did a few spins on the ice. Sentence5: Jan had fun ice skating.
Output:
Jan