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: My friends and I wanted to pass the time one day. Sentence2: We decided to race go karts. Sentence3: We raced for hours until we ran out of money. Sentence4: After racing, we ate lunch at our friend's house. Sentence5: I can't wait to race go karts again.
Output:
I (myself), Our friend, My friends