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: Peter wanted to be nice and kind to everyone he met. Sentence2: One day he met someone that he didn't like as much. Sentence3: Peter still wanted to be nice to him however. Sentence4: He struggled a little bit but finally was nice to him. Sentence5: Peter is now best friends with this person!
Output:
Peter