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.
Input: Sentence1: Mike was playing basketball by himself. Sentence2: And he noticed someone who was able to make shots from very far away. Sentence3: Mike asked he if could play. Sentence4: But the person refused. Sentence5: Mike practiced until the he was able to play with the other person.
Output:
Mike, Someone